0001437749-25-033351 | 10-Q | XBRL Viewer | American Superconductor Corp DE

Inventory Disclosure [Text Block]

9. Inventory

Inventory, net of reserves, at September 30, 2025 and March 31, 2025 consisted of the following (in thousands):

	*September 30, 2025*		*March 31, 2025*
Raw materials	$	37,803	$	35,892
Work-in-process		25,842		19,633
Finished goods		6,794		9,888
Deferred program costs		5,018		5,756
Net inventory	$	75,457	$	71,169

The Company recorded inventory write-downs of $1.1 million and $0.3 million for the three months ended September 30, 2025 and 2024, respectively. The Company recorded inventory write-downs of $1.8 million and $0.8 million for the six months ended September 30, 2025 and 2024, respectively. These write-downs were based on the Company's evaluation of its inventory on hand for excess quantities and obsolescence.

Deferred program costs as of September 30, 2025 and March 31, 2025 primarily represent costs incurred on programs where the Company needs to complete performance obligations before the related revenue and costs will be recognized.

Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Current assets:
Cash and cash equivalents	$ 212,891	$ 79,494
Accounts receivable, net	39,870	46,186
Inventory, net	75,457	71,169
Prepaid expenses and other current assets	11,775	8,055
Restricted cash	2,867	1,613
Total current assets	342,860	206,517
Property, plant and equipment, net	38,956	38,572
Intangibles, net	5,242	5,916
Right-of-use assets	3,789	3,829
Goodwill	48,164	48,164
Restricted cash	2,998	4,274
Deferred tax assets	1,250	1,178
Equity-method investments	1,511	1,113
Other assets	833	958
Total assets	445,603	310,521
Current liabilities:
Accounts payable and accrued expenses	34,679	32,282
Lease liability, current portion	968	685
Deferred revenue, current portion	52,157	66,797
Total current liabilities	87,804	99,764
Deferred revenue, long-term portion	11,233	9,336
Lease liability, long-term portion	2,681	2,684
Deferred tax liabilities, long-term portion	1,674	1,595
Other liabilities	29	28
Total liabilities	103,421	113,407
Commitments and Contingencies (Note 16)
Stockholders' equity:
Common stock, $0.01 par value, 75,000,000 shares authorized; 45,590,140 and 39,887,536 shares issued and 45,186,789 and 39,484,185 shares outstanding at September 30, 2025 and March 31, 2025, respectively	456	399
Additional paid-in capital	1,393,266	1,259,540
Treasury stock, at cost, 403,351 at September 30, 2025 and March 31, 2025	(3,765)	(3,765)
Accumulated other comprehensive income	1,376	1,565
Accumulated deficit	(1,049,151)	(1,060,625)
Total stockholders' equity	342,182	197,114
Total liabilities and stockholders' equity	$ 445,603	$ 310,521

Note 16 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Restricted Cash and Cash Equivalent, Noncurrent	$ 2,998	$ 4,274
Restricted Cash and Cash Equivalent, Current	$ 2,900	$ 1,600

Note 15 - Leases - Minimum Future Lease Obligation (Details) $ in Thousands	Sep. 30, 2025 USD ($)
2026 (remaining)	$ 693
2027	1,555
2028	1,003
2029	396
2030	326
Thereafter	1,227
Total minimum lease payments	5,200
Less: interest	(1,551)
Present value of lease liabilities	$ 3,649

Note 3 - Revenue Recognition - Revenues by Major Customers (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Inox Wind Limited [Member] \| Wind [Member]
Concentration percentage	16.00%	12.00%	16.00%	14.00%
Anovion LLC [Member] \| Grid [Member]
Concentration percentage	12.00%
Anovion LLC [Member] \| Grid [Member] \| Maximum [Member]
Concentration percentage		10.00%	10.00%	10.00%
Fuji Bridex Pte Ltd [Member] \| Grid [Member]
Concentration percentage			13.00%
Fuji Bridex Pte Ltd [Member] \| Grid [Member] \| Maximum [Member]
Concentration percentage	10.00%	10.00%		10.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Unaudited Condensed Consolidated Balance Sheets (Parentheticals) - $ / shares	Sep. 30, 2025	Mar. 31, 2025
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	45,590,140	39,887,536
Common stock, shares outstanding (in shares)	45,186,789	39,484,185
Treasury stock, common shares (in shares)	403,351	403,351

Note 7 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on a Recurring Basis (Details) - Fair Value, Recurring [Member] - Reported Value Measurement [Member] - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Cash equivalents	$ 177,543	$ 51,230
Short-term Cash Instruments [Member]
Short-term cash instruments	1,351	1,404
Fair Value, Inputs, Level 1 [Member]
Cash equivalents	177,543	51,230
Fair Value, Inputs, Level 1 [Member] \| Short-term Cash Instruments [Member]
Short-term cash instruments	0	0
Fair Value, Inputs, Level 2 [Member]
Cash equivalents	0	0
Fair Value, Inputs, Level 2 [Member] \| Short-term Cash Instruments [Member]
Short-term cash instruments	1,351	1,404
Fair Value, Inputs, Level 3 [Member]
Cash equivalents	0	0
Fair Value, Inputs, Level 3 [Member] \| Short-term Cash Instruments [Member]
Short-term cash instruments	$ 0	$ 0

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

Note 17 - Business Segments - Total Business Segments Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Total assets	$ 445,603	$ 310,521
Operating Segments [Member] \| Grid [Member]
Total assets	209,101	211,520
Operating Segments [Member] \| Wind [Member]
Total assets	17,665	13,697
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Total assets	$ 218,837	$ 85,304

Amount of asset recognized for present right to economic benefit.

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Note 2 - Acquisition (Tables)

6 Months Ended

Sep. 30, 2025

Business Combination [Table Text Block]

Cash payments	$30.0
Issuance of 1,297,600 shares of Company’s common stock	$31.4

Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]

Cash and cash equivalents	$	0.4
Equity-method investments		1.2
Prepaid expenses and other current assets		1.7
Accounts receivable		16.1
Inventory		23.1
Property, plant, and equipment		28.4
Accounts payable and accrued expenses		(5.6	)
Deferred revenue		(5.0	)
Deferred tax liability		(5.6	)
Net tangible assets/(liabilities)		54.7

Backlog		0.7
Customer relationships		1.3
Net identifiable intangible assets		2.0

Goodwill		4.7

Total purchase consideration	$	61.4

Business Combination, Pro Forma Information [Table Text Block]

	*Three Months Ended September 30, 2024*		*Six Months Ended September 30, 2024*
Net Revenue	$	58,722	$	118,032
Operating income (loss)		81		(4,079	)
Net income (loss)	$	635	$	(2,748	)

Net income per common share
Basic	$	0.02	$	(0.07	)
Diluted	$	0.02	$	(0.07	)
Shares - basic		37,404		37,189
Shares - diluted		37,950		37,189

Tabular disclosure of business combination. Includes, but is not limited to, recognized asset and liability.

Note 8 - Accounts Receivable - Summary of Accounts Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Accounts receivable (billed)	$ 31,543	$ 39,810
Accounts receivable (unbilled)	8,327	6,376
Accounts receivable	$ 39,870	$ 46,186

Note 10 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Property, plant and equipment, gross	$ 91,190	$ 88,964
Less accumulated depreciation	(52,234)	(50,392)
Property, plant and equipment, net	38,956	38,572
Land [Member]
Property, plant and equipment, gross	22,650	22,650
Construction in Progress [Member]
Property, plant and equipment, gross	601	1,371
Building [Member]
Property, plant and equipment, gross	7,986	7,528
Equipment and Software [Member]
Property, plant and equipment, gross	49,969	47,774
Furniture and Fixtures [Member]
Property, plant and equipment, gross	1,728	1,672
Leasehold Improvements [Member]
Property, plant and equipment, gross	$ 8,256	$ 7,969

Note 10 - Property, Plant and Equipment (Tables)

6 Months Ended

Sep. 30, 2025

Property, Plant and Equipment [Table Text Block]

	*September 30, 2025*			*March 31, 2025*
Land	$	22,650		$	22,650
Construction in progress – equipment		601			1,371
Buildings		7,986			7,528
Equipment and software		49,969			47,774
Furniture and fixtures		1,728			1,672
Leasehold improvements		8,256			7,969
Property, plant and equipment, gross		91,190			88,964
Less accumulated depreciation		(52,234	)		(50,392	)
Property, plant and equipment, net	$	38,956		$	38,572

Note 5 - Computation of Net Income Per Share of Common Stock - Reconciliation of Numerators and Denominators of EPS Calculation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Net income	$ 4,750	$ 6,724	$ 4,887	$ (2,524)	$ 11,474	$ 2,363
Weighted-average shares of common stock outstanding (in shares)	45,170		37,931		43,028	37,463
Weighted-average shares subject to repurchase (in shares)	(1,928)		(979)		(1,958)	(1,146)
Shares used in per-share calculation - basic (in shares)	43,242		36,952		41,070	36,317
Shares used in per-share calculation - diluted (in shares)	44,210		37,499		41,988	36,951
Net income per share - basic (in dollars per share)	$ 0.11		$ 0.13		$ 0.28	$ 0.07
Net income per share - diluted (in dollars per share)	$ 0.11		$ 0.13		$ 0.27	$ 0.06

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iv))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 42: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 43: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 60B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-60B

Reference 44: http://www.xbrl.org/2003/role/disclosureRef
-Topic 205
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483499/205-20-50-7

Reference 45: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 46: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1A

Reference 47: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1B

Reference 48: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (f)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481538/470-20-65-4

Reference 49: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(22))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

Note 2 - Acquisition - Schedule of Business Acquisitions (Details) - Megatran [Member] $ in Millions	Aug. 01, 2024 USD ($)
Cash payments	$ 30.0
Issuance of 1,297,600 shares of Company’s common stock	$ 31.4

Note 3 - Revenue Recognition

6 Months Ended

Sep. 30, 2025

Revenue from Contract with Customer [Text Block]

3. Revenue Recognition

The Company’s revenues in its Grid segment are derived primarily through enabling the transmission and distribution of power, providing planning services that allow it to identify power grid needs and risks, and developing ship protection systems for the U.S. Navy. The Company’s revenues in its Wind segment are derived primarily through supplying advanced power electronics and control systems, licensing its highly engineered wind turbine designs, and providing extensive customer support services to wind turbine manufacturers. The Company records revenue based on a five-step model in accordance with Accounting Standards Codification ("ASC") 606. For its customer contracts, the Company identifies the performance obligations, determines the transaction price, allocates the contract transaction price to the performance obligations, and recognizes the revenue when (or as) control of goods or services is transferred to the customer. For both the three and six months ended September 30, 2025, 90% of revenue was recognized at the point in time when control transferred to the customer, with the remainder being recognized over time. For the three and six months ended September 30, 2024, 90% and 89%, respectively, of revenue was recognized at the point in time when control transferred to the customer, with the remainder being recognized over time.

In the Company's equipment and system product line, each contract with a customer summarizes each product sold to a customer, which typically represents distinct performance obligations. A contract's transaction price is allocated to each distinct performance obligation using the respective standalone selling price which is determined primarily using the cost-plus expected margin approach and recognized as revenue when, or as, the performance obligation is satisfied. The majority of the Company’s product sales transfer control to the customer in line with the contracted delivery terms and revenue is recorded at the point in time when title and risk transfer to the customer, which is primarily upon delivery, as the Company has determined that this is the point in time that control transfers to the customer.

In the Company's service and technology development product line, there are several different types of transactions and each begins with a contract with a customer that summarizes each product sold to a customer, which typically represents distinct performance obligations. The technology development transactions are primarily for activities that have no alternative use and for which a profit can be expected throughout the life of the contract. In these cases, the revenue is recognized over time, but in the instances where the profit cannot be assured throughout the entire contract then the revenue is recognized at a point in time. Each contract's transaction price is allocated to each distinct performance obligation using the respective standalone selling price which is determined primarily using the cost-plus expected margin approach. The ongoing service transactions are for service contracts that provide benefit to the customer simultaneously as the Company performs its obligations, and therefore this revenue is recognized ratably over time throughout the effective period of these contracts. The transaction prices on these contracts are allocated based on an adjusted market approach which is re-assessed annually for reasonableness. The field service transactions include contracts for delivery of goods and completion of services made at the customer's requests, which are not deemed satisfied until the work has been completed and/or the requested goods have been delivered, so all of this revenue is recognized at the point in time when the control changes, and at allocated prices based on the adjusted market approach driven by standard price lists. The royalty transactions are related to certain contract terms on transactions in the Company's equipment and systems product line based on activity as specified in the contracts. The transaction prices of these agreements are calculated based on an adjusted market approach as specified in the contract. The Company reports royalty revenue for usage-based royalties when the sales have occurred. In circumstances when collectability is not assured and a contract does not exist under ASC 606, revenue is deferred until a non-refundable payment has been received for substantially all the amount that is due and there are no further remaining performance obligations.

The Company's service contracts can include a purchase order from a customer for specific goods in which each item is a distinct performance obligation satisfied at a point in time at which control of the goods is transferred to the customer. This transfer occurs based on the contracted delivery terms or when the requested service work has been completed. The transaction price for these goods is allocated based on the adjusted market approach considering similar transactions under similar circumstances. Service contracts are also derived from ongoing maintenance contracts and extended service-type warranty contracts. In these transactions, the Company is contracted to provide an ongoing service over a specified period of time. As the customer is consuming the benefits as the service is being provided, the revenue is recognized over time ratably.

The Company’s policy is not to accept volume discounts, product returns, or rebates and allowances within its contracts. In the event a contract was approved with any of these terms, it would be evaluated for variable consideration, estimated and recorded as a reduction of revenue in the same period the related product revenue was recorded.

The Company provides assurance-type warranties on all product sales for a term of typically one to three years, and extended service-type warranties are available for purchase at the customer's option for an additional term ranging up to four additional years. The Company accrues for the estimated warranty costs for assurance warranties at the time of sale based on historical warranty experience plus any known or expected changes in warranty exposure. For all extended service-type warranties, the Company recognizes the revenue ratably over time during the effective period of the services.

Infrequently, the Company receives requests from customers to hold product being purchased from us for a valid business purpose. The Company recognizes revenues for such arrangements provided the transaction meets, at a minimum, the following criteria: the reason for the bill-and-hold arrangement must be substantive; the product must be identified separately as belonging to the customer; the product currently must be ready for physical transfer to the customer; the entity cannot have the ability to use the product or to direct it to another customer. Revenue for the three and six months ended September 30, 2025 included $7.9 million from such held transactions. There were no such transactions for the three and six months ended September 30, 2024.

The Company records revenue net of sales tax, value added tax, excise tax and other taxes collected concurrent with revenue-producing activities. The Company has elected to recognize the cost for freight and shipping when control over the products sold passes to customers and revenue is recognized. The Company has elected to recognize incremental costs of obtaining a contract as expense when incurred except in contracts where the amortization period would exceed twelve months. As of September 30, 2025 and March 31, 2025, the Company's capitalized incremental contract costs were not material. The Company has elected not to adjust the promised amount of consideration for the effects of a significant financing component if the period of financing is twelve months or less. The Company has elected to recognize revenue based on the as invoiced practical expedient if there is a right to consideration from a customer in an amount that corresponds directly with the value of the Company's performance.

The Company’s contracts with customers do not typically include extended payment terms and may include milestone billing over the life of the contract. Payment terms vary by contract type and type of customer and generally range from 30 to 60 days from delivery.

The following tables disaggregate the Company’s revenue by product line and by shipment destination (in thousands):

	*Three Months Ended September 30, 2025*				*Six Months Ended September 30, 2025*
Product Line:	*Grid*		*Wind*		*Grid*		*Wind*
Equipment and systems	$	49,951	$	11,223	$	105,574	$	23,103
Services and technology development		4,391		297		8,855		688
Total	$	54,342	$	11,520	$	114,429	$	23,791

Region:
Americas	$	47,400	$	16	$	85,421	$	16
Asia Pacific		4,026		11,425		22,329		23,696
EMEA		2,916		79		6,679		79
Total	$	54,342	$	11,520	$	114,429	$	23,791

	*Three Months Ended September 30, 2024*				*Six Months Ended September 30, 2024*
Product Line:	*Grid*		*Wind*		*Grid*		*Wind*
Equipment and systems	$	43,747	$	7,166	$	74,452	$	14,591
Services and technology development		3,189		369		4,820		898
Total	$	46,936	$	7,535	$	79,272	$	15,489

Region:
Americas	$	43,479	$	1	$	73,957	$	1
Asia Pacific		790		7,531		1,989		15,483
EMEA		2,667		3		3,326		5
Total	$	46,936	$	7,535	$	79,272	$	15,489

As of September 30, 2025 and 2024, the Company’s contract assets and liabilities primarily relate to the timing differences between cash received from a customer in connection with contractual rights to invoicing and the timing of revenue recognition following completion of performance obligations. The Company's accounts receivable balance is made up entirely of customer contract related balances. Changes in the Company’s contract assets, which are included in “Unbilled accounts receivable” and “Deferred program costs” (see Note 8, “Accounts Receivable” and Note 9, “Inventory” for a reconciliation to the condensed consolidated balance sheets) and "Contract liabilities", which are included in the current portion and long-term portion of "Deferred revenue" in the Company’s condensed consolidated balance sheets, are as follows (in thousands):

	*Unbilled Accounts Receivable*			*Deferred Program Costs*			*Contract Liabilities*
Beginning balance as of March 31, 2025	$	6,376		$	5,756		$	76,133
Increases for costs incurred to fulfill performance obligations		—			15,934			—
Increase (decrease) due to customer billings		(10,269	)		—			47,765
Decrease due to cost recognition on completed performance obligations		—			(16,718	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		12,207			—			(61,496	)
Other changes and FX impact		13			46			988
Ending balance as of September 30, 2025	$	8,327		$	5,018		$	63,390

	*Unbilled Accounts Receivable*			*Deferred Program Costs*			*Contract Liabilities*
Beginning balance as of March 31, 2024	$	6,150		$	2,523		$	57,829
Increase for balances acquired		—			—			5,049
Increases for costs incurred to fulfill performance obligations		—			4,866			—
Increase (decrease) due to customer billings		(6,241	)		—			70,133
Decrease due to cost recognition on completed performance obligations		—			(2,553	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		4,607			—			(52,084	)
Other changes and FX impact		7			12			344
Ending balance as of September 30, 2024	$	4,523		$	4,848		$	81,271

The Company’s remaining performance obligations represent the unrecognized revenue value of the Company’s contractual commitments. The Company’s performance obligations may vary significantly each reporting period based on the timing of major new contractual commitments. As of September 30, 2025, the Company had outstanding performance obligations on existing contracts under ASC 606 to be recognized in the next twelve months of approximately $209.5 million. There are also approximately $78.2 million of outstanding performance obligations to be recognized over a period of thirteen to sixty months. The remaining performance obligations are subject to customer actions and therefore the timing of revenue recognition cannot be reasonably estimated.

The following table sets forth customers who represented 10% or more of the Company’s total revenues for the three and six months ended September 30, 2025, and 2024:

		Three Months Ended						Six Months Ended
	Reportable	September 30,						September 30,
	Segment	2025			2024			2025			2024
Inox Wind Limited	Wind		16	%		12	%		16	%		14	%
Anovion LLC	Grid		12	%	<10		%	<10		%	<10		%
Fuji Bridex Pte Ltd	Grid	<10		%	<10		%		13	%	<10		%

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-9

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-10

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-15

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/606/tableOfContent

Note 7 - Fair Value Measurements (Tables)

6 Months Ended

Sep. 30, 2025

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	*Total Carrying Value*		*Quoted Prices in Active Markets (Level 1)*		*Significant Other Observable Inputs (Level 2)*		*Significant Unobservable Inputs (Level 3)*
September 30, 2025:
Assets:
Cash equivalents	$	177,543	$	177,543	$	—	$	—
Short-term cash instruments	$	1,351	$	—	$	1,351	$	—

	*Total Carrying Value*		*Quoted Prices in Active Markets (Level 1)*		*Significant Other Observable Inputs (Level 2)*		*Significant Unobservable Inputs (Level 3)*
March 31, 2025
Assets:
Cash equivalents	$	51,230	$	51,230	$	—	$	—
Short-term cash instruments	$	1,404	$	—	$	1,404	$	—

Note 12 - Accounts Payable and Accrued Expenses

6 Months Ended

Sep. 30, 2025

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

12. Accounts Payable and Accrued Expenses

Accounts payable and accrued expenses at September 30, 2025 and March 31, 2025 consisted of the following (in thousands):

	*September 30, 2025*		*March 31, 2025*
Accounts payable	$	7,404	$	6,733
Accrued inventories in-transit		3,343		2,111
Accrued other miscellaneous expenses		4,435		3,600
Accrued contract loss		111		97
Advanced deposits		4,495		1,267
Accrued compensation		9,902		13,418
Income taxes payable		455		305
Accrued product warranty		3,334		3,033
Accrued commissions		1,200		1,718
Total	$	34,679	$	32,282

The Company generally provides a one to three year warranty on its products, commencing upon delivery or installation where applicable. A provision is recorded upon revenue recognition to cost of revenues for estimated warranty expense based on historical experience.

Product warranty activity was as follows (in thousands):

	*Three Months Ended September 30,*						*Six Months Ended September 30,*
	*2025*			*2024*			*2025*			*2024*
Balance at beginning of period	$	3,240		$	2,542		$	3,033		$	2,363
Acquired warranty obligations		—			637			—			637
Provisions for warranties during the period		520			298			1,069			774
Settlements during the period		(426	)		(367	)		(768	)		(664	)
Balance at end of period	$	3,334		$	3,110		$	3,334		$	3,110

Note 10 - Property, Plant and Equipment

6 Months Ended

Sep. 30, 2025

Property, Plant and Equipment Disclosure [Text Block]

10. Property, Plant and Equipment

The cost and accumulated depreciation of property, plant and equipment at September 30, 2025 and March 31, 2025 are as follows (in thousands):

	*September 30, 2025*			*March 31, 2025*
Land	$	22,650		$	22,650
Construction in progress – equipment		601			1,371
Buildings		7,986			7,528
Equipment and software		49,969			47,774
Furniture and fixtures		1,728			1,672
Leasehold improvements		8,256			7,969
Property, plant and equipment, gross		91,190			88,964
Less accumulated depreciation		(52,234	)		(50,392	)
Property, plant and equipment, net	$	38,956		$	38,572

Depreciation expense was $0.9 million and $0.8 million for the three months ended September 30, 2025 and 2024, respectively. Depreciation expense was $1.8 million and $1.4 million for the six months ended September 30, 2025 and 2024, respectively.

Note 4 - Stock-based Compensation - Weighted Average Assumptions Used in The Black Scholes Valuation Model (Details)	6 Months Ended
	Sep. 30, 2025
Expected volatility	74.01%
Risk-free interest rate	4.19%
Expected life (years) (Year)	6 years 3 months 21 days
Dividend yield	0.00%

Note 3 - Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Unbilled AR, ending balance	$ 6,376	$ 6,150
Deferred program costs, ending balance	5,756	2,523
Contract liabilities, ending balance	76,133	57,829
Increases for costs incurred to fulfill performance obligations	15,934	4,866
Increase (decrease) due to customer billings	(10,269)	(6,241)
Increase (decrease) due to customer billings	47,765	70,133
Decrease due to cost recognition on completed performance obligations	(16,718)	(2,553)
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	12,207	4,607
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	(61,496)	(52,084)
Unbilled AR, other changes and FX impact	13	7
Deferred program costs, other changes and FX impact	46	12
Contract liabilities, other changes and FX impact	988	344
Unbilled AR, ending balance	8,327	4,523
Deferred program costs, ending balance	5,018	4,848
Contract liabilities, ending balance	$ 63,390	81,271
Increase for balances acquired		$ 5,049

Note 12 - Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Accounts payable	$ 7,404	$ 6,733
Accrued inventories in-transit	3,343	2,111
Accrued other miscellaneous expenses	4,435	3,600
Accrued contract loss	111	97
Advanced deposits	4,495	1,267
Accrued compensation	9,902	13,418
Income taxes payable	455	305
Accrued product warranty	3,334	3,033
Accrued commissions	1,200	1,718
Total	$ 34,679	$ 32,282

Note 15 - Leases (Details Textual)	Sep. 30, 2025
Maximum [Member]
Lessee, Operating Lease, Renewal Term (Year)	5 years

Note 12 - Accounts Payable and Accrued Expenses (Tables)

6 Months Ended

Sep. 30, 2025

Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]

	*September 30, 2025*		*March 31, 2025*
Accounts payable	$	7,404	$	6,733
Accrued inventories in-transit		3,343		2,111
Accrued other miscellaneous expenses		4,435		3,600
Accrued contract loss		111		97
Advanced deposits		4,495		1,267
Accrued compensation		9,902		13,418
Income taxes payable		455		305
Accrued product warranty		3,334		3,033
Accrued commissions		1,200		1,718
Total	$	34,679	$	32,282

Schedule of Product Warranty Liability [Table Text Block]

	*Three Months Ended September 30,*						*Six Months Ended September 30,*
	*2025*			*2024*			*2025*			*2024*
Balance at beginning of period	$	3,240		$	2,542		$	3,033		$	2,363
Acquired warranty obligations		—			637			—			637
Provisions for warranties during the period		520			298			1,069			774
Settlements during the period		(426	)		(367	)		(768	)		(664	)
Balance at end of period	$	3,334		$	3,110		$	3,334		$	3,110

Note 2 - Acquisition - Schedule of Business Acquisitions (Details) (Parentheticals)	Aug. 01, 2024 shares
Megatran [Member]
Business Combination, Share Issued (in shares)	1,297,600

Note 11 - Equity-method Investments (Tables)

6 Months Ended

Sep. 30, 2025

Equity Method Investments [Table Text Block]

	*Three Months Ended September 30,*		*Six Months Ended September 30,*
	*2025*		*2025*
Net revenue	$	1,087	$	3,686
Gross profit		494		1,654
Income from operation		98		755
Net income	$	122	$	867

Note 5 - Computation of Net Income Per Share of Common Stock (Tables)

6 Months Ended

Sep. 30, 2025

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	*Three Months Ended September 30,*						*Six Months Ended September 30,*
	*2025*			*2024*			*2025*			*2024*
Numerator:
Net income	$	4,750		$	4,887		$	11,474		$	2,363
Denominator:
Weighted-average shares of common stock outstanding		45,170			37,931			43,028			37,463
Weighted-average shares subject to repurchase		(1,928	)		(979	)		(1,958	)		(1,146	)
Shares used in per-share calculation ― basic		43,242			36,952			41,070			36,317
Shares used in per-share calculation ― diluted		44,210			37,499			41,988			36,951
Net income per share ― basic	$	0.11		$	0.13		$	0.28		$	0.07
Net income per share ― diluted	$	0.11		$	0.13		$	0.27		$	0.06

Note 4 - Stock-based Compensation (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Restricted Stock [Member]
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares)	7,000	817,500	887,000	842,500
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 28.4		$ 28.4
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			1 year 10 months 24 days
Restricted Stock [Member] \| Minimum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)			2 years
Restricted Stock [Member] \| Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)			3 years
Immediately Vested Common Stock [Member]
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares)	0	0	39,445	19,200
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)	0	0	2,112	0
Performance Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)			2 years
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 0.1		$ 0.1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			1 year 8 months 12 days

Unaudited Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Mar. 31, 2024	37,343,000
Balance at Mar. 31, 2024	$ 373	$ 1,212,913	$ (3,639)	$ 1,582	$ (1,066,658)	$ 144,571
Issuance of common stock – restricted shares, net of forfeited shares (in shares)	44,000
Issuance of common stock – restricted shares, net of forfeited shares	$ 1	(1)	0	0	0	0
Stock-based compensation expense	$ 0	1,229	0	0	0	1,229
Issuance of common stock for 401(k) match (in shares)	12,000
Issuance of common stock for 401(k) match	$ 0	179	0	0	0	179
Cumulative translation adjustment	0	0	0	15	0	15
Net income	$ 0	0	0	0	(2,524)	(2,524)
Balance (in shares) at Jun. 30, 2024	37,399,000
Balance at Jun. 30, 2024	$ 374	1,214,320	(3,765)	1,597	(1,069,182)	143,344
Repurchase of treasury stock	$ 0	0	(126)	0	0	(126)
Balance (in shares) at Mar. 31, 2024	37,343,000
Balance at Mar. 31, 2024	$ 373	1,212,913	(3,639)	1,582	(1,066,658)	144,571
Net income						2,363
Balance (in shares) at Sep. 30, 2024	39,827,000
Balance at Sep. 30, 2024	$ 398	1,253,168	(3,765)	1,509	(1,064,295)	187,015
Balance (in shares) at Jun. 30, 2024	37,399,000
Balance at Jun. 30, 2024	$ 374	1,214,320	(3,765)	1,597	(1,069,182)	143,344
Issuance of common stock – restricted shares, net of forfeited shares (in shares)	815,000
Issuance of common stock – restricted shares, net of forfeited shares	$ 8	(8)	0	0	0	0
Stock-based compensation expense	$ 0	843	0	0	0	843
Issuance of common stock for 401(k) match (in shares)	7,000
Issuance of common stock for 401(k) match	$ 0	166	0	0	0	166
Cumulative translation adjustment	0	0	0	(88)	0	(88)
Net income	$ 0	0	0	0	4,887	4,887
Issuance of common stock – ESPP (in shares)	8,000
Issuance of common stock – ESPP	$ 0	157	0	0	0	157
Balance (in shares) at Sep. 30, 2024	39,827,000
Balance at Sep. 30, 2024	$ 398	1,253,168	(3,765)	1,509	(1,064,295)	187,015
Issuance of common stock - Megatran acquisition, net of offering expenses (in shares)	1,298,000
Issuance of common stock - Megatran acquisition, net of offering expenses	$ 13	31,189	0	0	0	31,202
Issuance of common stock to settle contingent consideration (in shares)	300,000
Issuance of common stock to settle contingent consideration	$ 3	6,501	0	0	0	$ 6,504
Balance (in shares) at Mar. 31, 2025	39,888,000					39,484,185
Balance at Mar. 31, 2025	$ 399	1,259,540	(3,765)	1,565	(1,060,625)	$ 197,114
Issuance of common stock – restricted shares, net of forfeited shares (in shares)	918,000
Issuance of common stock – restricted shares, net of forfeited shares	$ 9	(9)	0	0	0	0
Stock-based compensation expense	$ 0	4,526	0	0	0	4,526
Issuance of common stock for 401(k) match (in shares)	14,000
Issuance of common stock for 401(k) match	$ 1	361	0	0	0	362
Issuance of common stock - equity offering, net of offering expenses (in shares)	4,744,000
Issuance of common stock - equity offering, net of offering expenses	$ 47	124,530	0	0	0	124,577
Cumulative translation adjustment	0	0	0	(187)	0	(187)
Net income	$ 0	0	0	0	6,724	6,724
Balance (in shares) at Jun. 30, 2025	45,564,000
Balance at Jun. 30, 2025	$ 456	1,388,948	(3,765)	1,378	(1,053,901)	$ 333,116
Balance (in shares) at Mar. 31, 2025	39,888,000					39,484,185
Balance at Mar. 31, 2025	$ 399	1,259,540	(3,765)	1,565	(1,060,625)	$ 197,114
Net income						$ 11,474
Balance (in shares) at Sep. 30, 2025	45,590,000					45,186,789
Balance at Sep. 30, 2025	$ 456	1,393,266	(3,765)	1,376	(1,049,151)	$ 342,182
Balance (in shares) at Jun. 30, 2025	45,564,000
Balance at Jun. 30, 2025	$ 456	1,388,948	(3,765)	1,378	(1,053,901)	333,116
Issuance of common stock – restricted shares, net of forfeited shares (in shares)	7,000
Issuance of common stock – restricted shares, net of forfeited shares	$ 0	0	0	0	0	0
Stock-based compensation expense	$ 0	3,766	0	0	0	3,766
Issuance of common stock for 401(k) match (in shares)	6,000
Issuance of common stock for 401(k) match	$ 0	310	0	0	0	310
Cumulative translation adjustment	0	0	0	(2)	0	(2)
Net income	$ 0	0	0	0	4,750	4,750
Exercise of stock options (in shares)	10,000
Exercise of stock options	$ 0	66	0	0	0	66
Issuance of common stock – ESPP (in shares)	3,000
Issuance of common stock – ESPP	$ 0	176	0	0	0	$ 176
Balance (in shares) at Sep. 30, 2025	45,590,000					45,186,789
Balance at Sep. 30, 2025	$ 456	$ 1,393,266	$ (3,765)	$ 1,376	$ (1,049,151)	$ 342,182

Note 15 - Leases - Operating Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Right-of-use assets – Operating	$ 3,789	$ 3,829
Total right-of-use assets	3,789	3,829
Lease liabilities – ST Operating	968	685
Lease liabilities – LT Operating	2,681	2,684
Total lease liabilities	$ 3,649	$ 3,369
Weighted-average remaining lease term (Year)	4 years 7 months 6 days	4 years 11 months 8 days
Weighted-average discount rate	14.58%	14.94%

Note 1 - Nature of the Business and Operations

6 Months Ended

Sep. 30, 2025

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

1. Nature of the Business and Operations

Nature of the Business and Operations

American Superconductor Corporation (together with its subsidiaries, “AMSC®” or the “Company”) was founded on April 9, 1987. The Company is a leading system provider of megawatt-scale power resiliency solutions that orchestrate the rhythm and harmony of power on the grid™ and protect and expand the capability of the Navy’s fleet. The Company’s system level products leverage its proprietary “smart materials” and “smart software and controls” to provide enhanced resiliency and improved performance of megawatt-scale power flow.

These unaudited condensed consolidated financial statements of the Company have been prepared on a going concern basis in accordance with United States generally accepted accounting principles (“GAAP”) and the Securities and Exchange Commission’s (“SEC”) instructions to Form 10-Q. All significant intercompany accounts and transactions are eliminated in consolidation. Investments in entities in which we do not have a controlling interest are accounted for under the equity method of accounting. The going concern basis of presentation assumes that the Company will continue operations and will be able to realize its assets and discharge its liabilities and commitments in the normal course of business. Certain information and footnote disclosures normally included in the condensed consolidated financial statements prepared in accordance with GAAP have been omitted pursuant to those instructions. The year-end balance sheet data was derived from audited financial statements but does not include all disclosures required by GAAP. The unaudited condensed consolidated financial statements, in the opinion of management, reflect all adjustments (consisting of normal recurring adjustments) necessary for a fair statement of the results for the interim periods ended September 30, 2025 and 2024, and the financial position at September 30, 2025; however, these results are not necessarily indicative of results which may be expected for the full year. The interim condensed consolidated financial statements, and notes thereto, should be read in conjunction with the audited condensed consolidated financial statements for the year ended March 31, 2025, and notes thereto, included in the Company’s Annual Report on Form 10-K for the year ended March 31, 2025 filed with the SEC on May 21, 2025.

Note 3 - Revenue Recognition (Tables)

6 Months Ended

Sep. 30, 2025

Disaggregation of Revenue [Table Text Block]

	*Three Months Ended September 30, 2025*				*Six Months Ended September 30, 2025*
Product Line:	*Grid*		*Wind*		*Grid*		*Wind*
Equipment and systems	$	49,951	$	11,223	$	105,574	$	23,103
Services and technology development		4,391		297		8,855		688
Total	$	54,342	$	11,520	$	114,429	$	23,791

Region:
Americas	$	47,400	$	16	$	85,421	$	16
Asia Pacific		4,026		11,425		22,329		23,696
EMEA		2,916		79		6,679		79
Total	$	54,342	$	11,520	$	114,429	$	23,791

	*Three Months Ended September 30, 2024*				*Six Months Ended September 30, 2024*
Product Line:	*Grid*		*Wind*		*Grid*		*Wind*
Equipment and systems	$	43,747	$	7,166	$	74,452	$	14,591
Services and technology development		3,189		369		4,820		898
Total	$	46,936	$	7,535	$	79,272	$	15,489

Region:
Americas	$	43,479	$	1	$	73,957	$	1
Asia Pacific		790		7,531		1,989		15,483
EMEA		2,667		3		3,326		5
Total	$	46,936	$	7,535	$	79,272	$	15,489

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

	*Unbilled Accounts Receivable*			*Deferred Program Costs*			*Contract Liabilities*
Beginning balance as of March 31, 2025	$	6,376		$	5,756		$	76,133
Increases for costs incurred to fulfill performance obligations		—			15,934			—
Increase (decrease) due to customer billings		(10,269	)		—			47,765
Decrease due to cost recognition on completed performance obligations		—			(16,718	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		12,207			—			(61,496	)
Other changes and FX impact		13			46			988
Ending balance as of September 30, 2025	$	8,327		$	5,018		$	63,390

	*Unbilled Accounts Receivable*			*Deferred Program Costs*			*Contract Liabilities*
Beginning balance as of March 31, 2024	$	6,150		$	2,523		$	57,829
Increase for balances acquired		—			—			5,049
Increases for costs incurred to fulfill performance obligations		—			4,866			—
Increase (decrease) due to customer billings		(6,241	)		—			70,133
Decrease due to cost recognition on completed performance obligations		—			(2,553	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		4,607			—			(52,084	)
Other changes and FX impact		7			12			344
Ending balance as of September 30, 2024	$	4,523		$	4,848		$	81,271

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

		Three Months Ended						Six Months Ended
	Reportable	September 30,						September 30,
	Segment	2025			2024			2025			2024
Inox Wind Limited	Wind		16	%		12	%		16	%		14	%
Anovion LLC	Grid		12	%	<10		%	<10		%	<10		%
Fuji Bridex Pte Ltd	Grid	<10		%	<10		%		13	%	<10		%

Note 8 - Accounts Receivable (Tables)

6 Months Ended

Sep. 30, 2025

Accounts Receivable [Table Text Block]

	*September 30, 2025*		*March 31, 2025*
Accounts receivable (billed)	$	31,543	$	39,810
Accounts receivable (unbilled)		8,327		6,376
Accounts receivable	$	39,870	$	46,186

Note 14 - Contingent Consideration

6 Months Ended

Sep. 30, 2025

Business Combination, Contingent Consideration [Text Block]

14. Contingent Consideration

NEPSI Contingent Consideration

On October 1, 2020 (the "NEPSI Acquisition Date"), the Company entered into a Stock Purchase Agreement (the "NEPSI Stock Purchase Agreement") with the selling stockholders named therein. Pursuant to the terms of the NEPSI Stock Purchase Agreement and concurrently with entering into such agreement, the Company acquired all of the issued and outstanding (i) shares of capital stock of NEPSI, and (ii) membership interests of Northeast Power Realty, LLC, a New York limited liability company, which holds the real property that serves as NEPSI's headquarters (the "NEPSI Acquisition"). NEPSI is a U.S.-based global provider of medium-voltage metal-enclosed power capacitor banks and harmonic filter banks for use on electric power systems. NEPSI is a wholly-owned subsidiary of the Company and is operated by its Grid business segment. The purchase price was $26.0 million in cash and 873,657 restricted shares of common stock of the Company. As part of the transaction, the selling stockholders were entitled to receive up to an additional 1,000,000 shares of common stock of the Company upon the achievement of certain specified revenue objectives during varying periods of up to four years following closing of the NEPSI Acquisition. During the year ended March 31, 2024, the Company issued 399,999 shares of common stock and cash in lieu of a fractional share of common stock, related to the achievement of specified revenue objectives in connection with the NEPSI Acquisition. One specified revenue objective, which would have earned the selling stockholders 300,000 shares of Company common stock, was not achieved. NEPSI recognized revenues in excess of $120.0 million during the four years after the NEPSI Acquisition Date. As a result, during the quarter ended September 30, 2024, the Company issued 300,000 shares of common stock of the Company to the selling stockholders, following certification of the achievement of the specified earnout revenue objective. As of September 30, 2024, the Company had settled all outstanding contingent consideration under the NEPSI Stock Purchase Agreement.

The Company evaluated the NEPSI Acquisition earnout payment set forth in the NEPSI Stock Purchase Agreement, which was expected to require settlement in the Company's common stock, and determined the contingent consideration qualified for liability classification and derivative treatment under ASC 815, Derivatives and Hedging. As a result, for the periods in which the Company had outstanding contingent consideration, the fair value of the contingent consideration was remeasured and the resulting gain or loss was recognized in operating expenses until the share amount was fixed.

NWL Contingent Consideration

On August 1, 2024, the Company entered into the Stock Purchase Agreement with the selling stockholders named therein. Pursuant to the terms of the Stock Purchase Agreement and concurrently with entering into such agreement, the Company acquired all of the issued and outstanding shares of Megatran for aggregate consideration in an amount equal to $61.4 million which consideration amount was subject to various adjustments set forth in the Stock Purchase Agreement. The value of the contingent consideration to make the sellers whole was determined to be de minimis at the time of the NWL Acquisition. On September 23, 2024, the Company paid $3.3 million to the selling stockholders, which was calculated based on the agreed upon formula set forth in the Stock Purchase Agreement. As of September 30, 2024, there were no remaining obligations to the selling stockholders of Megatran.

Following is a summary of the key assumptions used in a Monte Carlo simulation to calculate the fair value of the contingent consideration related to the NEPSI Acquisition:

	*June 30,*			*March 31,*
Fiscal Year 2024	*2024*			*2024*
Revenue risk premium		5.50	%		5.50	%
Revenue volatility		27.5	%		24.8	%
Stock Price	$	23.39		$	13.51
Payment delay (days)		80			80
Fair value (millions)	$	7.0		$	3.1

The Company did not record any activity related to contingent consideration in the three and six months ended September 30, 2025 as the liability was settled in the prior fiscal year. The Company recorded a gain resulting from the decrease in fair value of $0.5 million and a loss of $3.4 million resulting from the increases in the fair value of the contingent consideration in the three and six months ended September 30, 2024, respectively.

Note 6 - Goodwill and Other Intangibles - Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Gross Amount	$ 20,031	$ 20,031
BacklogAccumulated Amortization	(14,789)	(14,116)
Net Book Value	3,442
Intangible assets, net	5,242	5,916
Trade Names [Member]
Indefinite life intangible assets	1,800	1,800
Backlog [Member]
Gross Amount	1,381	1,381
BacklogAccumulated Amortization	(1,381)	(1,381)
Net Book Value	$ 0	0
Estimated Useful Life (Year)	2 years
Customer Relationships [Member]
Gross Amount	$ 10,880	10,880
BacklogAccumulated Amortization	(8,332)	(7,901)
Net Book Value	$ 2,548	2,980
Customer Relationships [Member] \| Minimum [Member]
Estimated Useful Life (Year)	7 years
Customer Relationships [Member] \| Maximum [Member]
Estimated Useful Life (Year)	10 years
Core Technology and Know-how [Member]
Gross Amount	$ 5,970	5,970
BacklogAccumulated Amortization	(5,076)	(4,834)
Net Book Value	$ 894	$ 1,136
Core Technology and Know-how [Member] \| Minimum [Member]
Estimated Useful Life (Year)	5 years
Core Technology and Know-how [Member] \| Maximum [Member]
Estimated Useful Life (Year)	10 years

Note 10 - Property, Plant and Equipment (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Depreciation, Depletion and Amortization	$ 0.9	$ 0.8	$ 1.8	$ 1.4

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

Note 8 - Accounts Receivable

6 Months Ended

Sep. 30, 2025

Accounts Receivable [Text Block]

8. Accounts Receivable

Accounts receivable at September 30, 2025 and March 31, 2025 consisted of the following (in thousands):

	*September 30, 2025*		*March 31, 2025*
Accounts receivable (billed)	$	31,543	$	39,810
Accounts receivable (unbilled)		8,327		6,376
Accounts receivable	$	39,870	$	46,186

Note 18 - Recent Accounting Pronouncements

6 Months Ended

Sep. 30, 2025

Accounting Standards Update and Change in Accounting Principle [Text Block]

18. Recent Accounting Pronouncements

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The amendments in ASU 2023-09 address investor requests for more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. Following the release of ASU 2023-09 in December 2023, the effective date was annual reporting periods beginning after December 15, 2024. As of September 30, 2025, the Company is evaluating the impact on its consolidated financial statements.

In March 2024, the FASB issued ASU 2024-02, Codification Improvements—Amendments to Remove References to the Concepts Statements. The amendments in ASU 2024-02 contain amendments to the Codification that remove references to various FASB Concepts Statements. Following the release of ASU 2024-02 in March 2024, the effective date was annual reporting periods beginning after December 15, 2024. As of September 30, 2025, the Company is evaluating the impact on its consolidated financial statements.

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures. The amendments in ASU 2024-03 address investor requests for more disclosure of disaggregated financial reporting information about expenses presented in the income statement. Following the release of ASU 2024-03 in November 2024, the effective date will be annual reporting periods beginning after December 15, 2026. As of September 30, 2025, the Company is evaluating the impact on its consolidated financial statements.

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

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-Name Accounting Standards Codification
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-Paragraph 5
-Subparagraph (SAB Topic 11.M.Q2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480530/250-10-S99-5

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
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Note 2 - Acquisition (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended				6 Months Ended		12 Months Ended
	Aug. 01, 2024	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Mar. 31, 2025
Cost of Revenue		$ 45,423		$ 38,858		$ 93,292	$ 66,923
Net Income (Loss) Attributable to Parent		4,750	$ 6,724	$ 4,887	$ (2,524)	11,474	$ 2,363
Megatran [Member]
Business Combination, Consideration Transferred	$ 61,400
Payments to Acquire Businesses, Gross	$ 30,000
Business Acquisition, Share Price (in dollars per share)	$ 24.16
Business Combination, Acquired Receivable, Fair Value	$ 16,100
Business Combination, Acquired Receivables, Gross Contractual Amount	16,900
Business Combination, Acquired Receivables, Estimated Uncollectible	800
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory	700
Cost of Revenue								$ 700
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	2,000
Revenues		16,400				34,100
Net Income (Loss) Attributable to Parent		2,000				4,500
Amortization of Intangible Assets		$ 100				$ 100
Megatran [Member] \| Backlog [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 700
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Month)	8 months
Megatran [Member] \| Customer Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 1,300
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Month)	10 years
Megatran [Member] \| Selling, General and Administrative Expenses [Member]
Business Combination, Acquisition Related Costs								$ 1,100

Note 19 - Subsequent Events

6 Months Ended

Sep. 30, 2025

Subsequent Events [Text Block]

19. Subsequent Events

The Company has performed an evaluation of subsequent events through the time of filing this Quarterly Report on Form 10-Q with the SEC and has determined that there are no such events to report.

Note 11 - Equity-method Investments (Details Textual) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Equity Method Investments	$ 1,511	$ 1,113
NWL Pacific Inc. Co., LTD [Member]
Equity Method Investment, Ownership Percentage	50.00%
Equity Method Investments	$ 1,500	$ 1,100

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

Note 3 - Revenue Recognition 1 (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue, Performance Obligation Satisfied, Revenue Recognized, Percentage		90.00%	90.00%	89.00%
Revenue from Contract with Customer, Products on Hold	$ 7,900	$ 0	$ 7,900	$ 0
Minimum [Member]
Warranty Period (Year)			1 year
Contract with Customer, Payment Term (Day)			30 days
Maximum [Member]
Warranty Period (Year)			3 years
Extended Service Warranty, Term (Year)			4 years
Contract with Customer, Payment Term (Day)			60 days

Note 4 - Stock-based Compensation (Tables)

6 Months Ended

Sep. 30, 2025

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	*Three Months Ended September 30,*				*Six Months Ended September 30,*
	*2025*		*2024*		*2025*		*2024*
Cost of revenues	$	266	$	39	$	605	$	97
Research and development		511		113		1,199		256
Selling, general and administrative		2,989		691		6,488		1,719
Total	$	3,766	$	843	$	8,292	$	2,072

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	*Six Months Ended September 30,*
	*2025*
Expected volatility		74.01	%
Risk-free interest rate		4.19	%
Expected life (years)		6.31
Dividend yield	None

Note 15 - Leases

6 Months Ended

Sep. 30, 2025

Lessee, Operating Leases [Text Block]

15. Leases

Operating Leases

All significant lease arrangements are recognized at lease commencement. Operating lease right–of-use assets and lease liabilities are recognized at commencement. The operating lease right-of-use asset includes any lease payments related to initial direct cost and prepayments and excludes any lease incentives. Lease expense is recognized on a straight-line basis over the lease term. The Company enters into a variety of operating lease agreements through the normal course of its business, but primarily real estate leases to support its operations. The real estate lease agreements generally provide for fixed minimum rental payments and the payment of real estate taxes and insurance. Many of these real estate leases have one or more renewal options that allow the Company, at its discretion, to renew the lease for varying periods up to five years or to terminate the lease. Only renewal options or termination rights that the Company believed were likely to be exercised were included in the lease calculations.

The Company also enters into leases for vehicles, IT equipment and service agreements, and other leases related to its manufacturing operations that are also included in the right-of-use assets and lease liability accounts if they are for a term of longer than twelve months. However, many of these leases are either short-term in nature or immaterial. The Company has made the policy election to exclude short-term leases from the condensed consolidated balance sheets.

Supplemental balance sheet information related to leases at September 30, 2025, and March 31, 2025 are as follows (in thousands):

	*September 30, 2025*			*March 31, 2025*
Leases:
Right-of-use assets – Operating	$	3,789		$	3,829
Total right-of-use assets		3,789			3,829

Lease liabilities – ST Operating	$	968		$	685
Lease liabilities – LT Operating		2,681			2,684
Total lease liabilities	$	3,649		$	3,369

Weighted-average remaining lease term		4.60			4.94
Weighted-average discount rate		14.58	%		14.94	%

The costs related to the Company's operating leases for the three and six months ended September 30, 2025 and 2024, are as follows (in thousands):

	*Three Months Ended*		*Six Months Ended*
	*September 30, 2025*		*September 30, 2025*
Operating Leases:
Operating lease costs – fixed	$	421	$	834
Operating lease costs – variable		45		91
Short-term lease costs		42		83
Total lease costs	$	508	$	1,008

	*Three Months Ended*		*Six Months Ended*
	*September 30, 2024*		*September 30, 2024*
Operating Leases:
Operating lease costs – fixed	$	336	$	645
Operating lease costs – variable		45		91
Short-term lease costs		39		78
Total lease costs	$	420	$	814

The Company’s estimated minimum future lease obligations under the Company's leases are as follows (in thousands):

	*Leases*
Year ending March 31,
2026 (remaining)	$	693
2027		1,555
2028		1,003
2029		396
2030		326
Thereafter		1,227
Total minimum lease payments		5,200
Less: interest		(1,551	)
Present value of lease liabilities	$	3,649

Note 4 - Stock-based Compensation - Stock-based Compensation Expense by Financial Statement Line Item (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Total stock-based compensation expense	$ 3,766	$ 843	$ 8,292	$ 2,072
Cost of Sales [Member]
Total stock-based compensation expense	266	39	605	97
Research and Development Expense [Member]
Total stock-based compensation expense	511	113	1,199	256
Selling, General and Administrative Expenses [Member]
Total stock-based compensation expense	$ 2,989	$ 691	$ 6,488	$ 1,719

Note 4 - Stock-based Compensation

6 Months Ended

Sep. 30, 2025

Share-Based Payment Arrangement [Text Block]

4. Stock-Based Compensation

The Company accounts for its stock-based compensation at fair value. The following table summarizes stock-based compensation expense by financial statement line item for the three and six months ended September 30, 2025, and 2024 (in thousands):

	*Three Months Ended September 30,*				*Six Months Ended September 30,*
	*2025*		*2024*		*2025*		*2024*
Cost of revenues	$	266	$	39	$	605	$	97
Research and development		511		113		1,199		256
Selling, general and administrative		2,989		691		6,488		1,719
Total	$	3,766	$	843	$	8,292	$	2,072

The Company issued 7,000 shares and 887,000 shares of restricted stock during the three and six months ended September 30, 2025, respectively. The Company issued no shares and 39,445 shares of immediately vested common stock during the three and six months ended September 30, 2025, respectively. The Company issued 817,500 shares and 842,500 shares of restricted stock during the three and six months ended September 30, 2024, respectively. The Company issued no shares and 19,200 shares of immediately vested common stock during the three and six months ended September 30, 2024, respectively. These restricted stock awards generally vest over 2-3 years. Awards for restricted stock include both time-based and performance-based awards. For options and restricted stock awards that vest upon the passage of time, expense is being recorded over the vesting period. Performance-based awards are expensed over the requisite service period based on probability of achievement.

The Company granted no stock options and 2,112 stock options during the three and six months ended September 30, 2025, respectively. The Company granted no stock options during the three and six months ended September 30, 2024. The stock options granted during the six months ended September 30, 2025 will vest over 2 years. The estimated fair value of the Company’s stock-based awards, less expected annual forfeitures, is amortized over the awards’ service period. There were less than $0.1 million of unrecognized compensation costs for unvested stock options as of September 30, 2025. This expense will be recognized over a weighted average period of approximately 1.7 years. The total unrecognized compensation cost for unvested outstanding restricted stock was $28.4 million as of September 30, 2025. This expense will be recognized over a weighted-average expense period of approximately 1.9 years.

The weighted average assumptions used in the Black Scholes valuation model for stock options granted during the six months ended September 30, 2025 are as follows:

	*Six Months Ended September 30,*
	*2025*
Expected volatility		74.01	%
Risk-free interest rate		4.19	%
Expected life (years)		6.31
Dividend yield	None

Note 6 - Goodwill and Other Intangibles (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Mar. 31, 2025
Goodwill, Acquired During Period					$ 4,700
Goodwill, Period Increase (Decrease)			$ 0
Goodwill, Impairment Loss	$ 0	$ 0	0	$ 0
Customer Relationship, Core Technology and Know-how [Member]
Amortization of Intangible Assets	$ 300	$ 400	$ 700	$ 800

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

Note 14 - Contingent Consideration - Summary of the Key Assumptions Used to Calculate Fair Value of Warrants (Details) $ in Millions	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)
Fair value (millions)	$ 7.0	$ 3.1
Measurement Input, Revenue Risk Premium [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	5.5	5.5
Measurement Input, Revenue Volatility [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	27.5	24.8
Measurement Input, Share Price [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	23.39	13.51
Measurement Input, Payment Delay [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	80	80

Note 9 - Inventory (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Inventory Write-down	$ 1,100	$ 300	$ 1,790	$ 780

Note 17 - Business Segments

6 Months Ended

Sep. 30, 2025

Segment Reporting Disclosure [Text Block]

17. Business Segments

The Company reports its financial results in two reportable business segments: Grid and Wind. In accordance with ASC 280, Segment Reporting, the Company has identified two operating segments. The Company's operating segments reflect the way in which internally-reported financial information is used to make decisions and allocate resources.

Through the Company’s power grid offerings, the Grid business segment enables electric utilities, industrial facilities, and renewable energy project developers to connect, transmit and distribute smarter, cleaner and better power through its transmission planning services, power electronics, and superconductor-based systems. The sales process is enabled by transmission planning services that allow it to identify power grid congestion, poor power quality and other risks, which helps the Company determine how its solutions can improve network performance. These services often lead to sales of grid interconnection solutions for wind farms and solar power plants, power quality systems, and transmission and distribution cable systems. The Company also sells ship protection products to the U.S. Navy through its Grid business segment.

Through the Company’s wind power offerings, the Wind business segment enables manufacturers to field highly competitive wind turbines through its advanced power electronics and control system products, engineered designs, and support services. The Company supplies advanced power electronics and control systems, licenses its highly engineered wind turbine designs, and provides extensive customer support services to wind turbine manufacturers. The Company’s design portfolio includes a broad range of drive trains and power ratings of 2 megawatts ("MWs") and higher. The Company provides a broad range of power electronics and software-based control systems that are highly integrated and designed for optimized performance, efficiency, and grid compatibility.

AMSC’s Chief Executive Officer Daniel McGahn is the chief operating decision maker. The chief operating decision maker uses segment operating income (loss) to allocate resources (including employees, property, and financial or capital resources) for each segment predominantly in the annual budget and forecasting process. The chief operating decision maker considers budget-to-actual variances on a monthly basis for segment operating income (loss) when making decisions about allocating capital and personnel to the segments. The chief operating decision maker also uses segment operating income or loss to assess the performance for each segment by comparing the results and return on assets of each segment with one another and in the compensation of certain employees.

The following tables (i) summarize total sales by segment and (ii) reconcile each segment's sales to their respective segment operating income, including segment operating expenses, for each of the three and six months ended September 30, 2025 and 2024 (in thousands):

	Three Months Ended September 30, 2025								Six Months Ended September 30, 2025
	*Grid*		*Wind*		*Unallocated*		*Total*		*Grid*		*Wind*		*Unallocated*		*Total*
Segment operating income:
Revenues	$	54,342	$	11,520	$	-	$	65,862	$	114,429	$	23,791	$	-	$	138,220

Less (a)
Segment other operating expenses (b)		53,064		9,833		-		62,897		108,994		20,616		-		129,610
Segment operating income	$	1,278	$	1,687	$	-	$	2,965	$	5,435	$	3,175	$	-	$	8,610

(a) The significant expense categories and amounts align with the segment-level information that is regularly provided to the chief operating decision maker.

(b) Segment other operating expense includes cost of sales, research and development expense, selling general, and administrative expense, and amortization of acquisition related intangibles.

	*Three Months Ended September 30, 2024*										*Six Months Ended September 30, 2024*
	*Grid*		*Wind*		*Unallocated*			*Total*			*Grid*		*Wind*		*Unallocated*			*Total*
Segment operating income:
Revenues	$	46,936	$	7,535	$	-		$	54,471		$	79,272	$	15,489	$	-		$	94,761

Less (a)
Segment other operating expenses (b)		45,366		7,096		2,762			55,224			77,939		14,183		6,682			98,804
Segment operating income (loss)	$	1,570	$	439	$	(2,762	)	$	(753	)	$	1,333	$	1,306	$	(6,682	)	$	(4,043	)

(a) The significant expense categories and amounts align with the segment-level information that is regularly provided to the chief operating decision maker.

(b) Segment other operating expense includes cost of sales, research and development expense, selling general, and administrative expense, amortization of acquisition related intangibles, and gain/loss on contingent consideration.

Unallocated corporate expenses included a net loss on contingent consideration $2.8 million and $6.7 million in the three and six months ended September 30, 2024, respectively.

The reconciliation of segment operating income (loss) to consolidated income (loss) before income taxes for the three and six months ended September 30, 2025 and 2024 is as follows (in thousands):

	Three Months Ended September 30,						Six Months Ended September 30, 2025
	*2025*			*2024*			*2025*			*2024*

Operating income (loss):	$	2,965		$	(753	)	$	8,610		$	(4,043	)
Interest income, net		2,269			979			3,201		$	2,099
Other expense, net		(367	)		(329	)		(21	)		(489	)
Income (loss) before income tax expense (benefit)	$	4,867		$	(103	)	$	11,790		$	(2,433	)

Depreciation and amortization expense by segment for the three and six months ended September 30, 2025 and 2024 is as follows (in thousands):

	*Three Months Ended September 30,*				*Six Months Ended September 30, 2025*
	*2025*		*2024*		*2025*		*2024*
Grid	$	1,266	$	1,376	$	2,468	$	2,363
Wind		31		11		57	$	32
Total	$	1,297	$	1,387	$	2,525	$	2,395

The accounting policies of the business segments are the same as those for the consolidated Company. The Company’s business segments have been determined in accordance with the Company’s internal management structure, which is organized based on operating activities. The Company evaluates performance based upon several factors, of which the primary financial measures are segment revenues and segment operating income (loss). The disaggregated financial results of the segments reflect allocation of certain functional expense categories consistent with the basis and manner in which Company management internally disaggregates financial information for the purpose of assisting in making internal operating decisions. In addition, certain corporate expenses which the Company does not believe are specifically attributable or allocable to either of the two business segments have been excluded from the segment operating income (loss).

Total assets for the two business segments as of September 30, 2025 and March 31, 2025, are as follows (in thousands):

	*September 30, 2025*		*March 31, 2025*
Grid	$	209,101	$	211,520
Wind		17,665		13,697
Corporate assets		218,837		85,304
Total	$	445,603	$	310,521

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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Note 17 - Business Segments (Tables)

6 Months Ended

Sep. 30, 2025

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Three Months Ended September 30, 2025								Six Months Ended September 30, 2025
	*Grid*		*Wind*		*Unallocated*		*Total*		*Grid*		*Wind*		*Unallocated*		*Total*
Segment operating income:
Revenues	$	54,342	$	11,520	$	-	$	65,862	$	114,429	$	23,791	$	-	$	138,220

Less (a)
Segment other operating expenses (b)		53,064		9,833		-		62,897		108,994		20,616		-		129,610
Segment operating income	$	1,278	$	1,687	$	-	$	2,965	$	5,435	$	3,175	$	-	$	8,610

	*Three Months Ended September 30, 2024*										*Six Months Ended September 30, 2024*
	*Grid*		*Wind*		*Unallocated*			*Total*			*Grid*		*Wind*		*Unallocated*			*Total*
Segment operating income:
Revenues	$	46,936	$	7,535	$	-		$	54,471		$	79,272	$	15,489	$	-		$	94,761

Less (a)
Segment other operating expenses (b)		45,366		7,096		2,762			55,224			77,939		14,183		6,682			98,804
Segment operating income (loss)	$	1,570	$	439	$	(2,762	)	$	(753	)	$	1,333	$	1,306	$	(6,682	)	$	(4,043	)

	Three Months Ended September 30,						Six Months Ended September 30, 2025
	*2025*			*2024*			*2025*			*2024*

Operating income (loss):	$	2,965		$	(753	)	$	8,610		$	(4,043	)
Interest income, net		2,269			979			3,201		$	2,099
Other expense, net		(367	)		(329	)		(21	)		(489	)
Income (loss) before income tax expense (benefit)	$	4,867		$	(103	)	$	11,790		$	(2,433	)

	*Three Months Ended September 30,*				*Six Months Ended September 30, 2025*
	*2025*		*2024*		*2025*		*2024*
Grid	$	1,266	$	1,376	$	2,468	$	2,363
Wind		31		11		57	$	32
Total	$	1,297	$	1,387	$	2,525	$	2,395

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

	*September 30, 2025*		*March 31, 2025*
Grid	$	209,101	$	211,520
Wind		17,665		13,697
Corporate assets		218,837		85,304
Total	$	445,603	$	310,521

Note 6 - Goodwill and Other Intangibles

6 Months Ended

Sep. 30, 2025

Goodwill and Intangible Assets Disclosure [Text Block]

6. Goodwill and Other Intangibles

Goodwill

Goodwill represents the difference between the purchase price and the fair value of the identifiable tangible and intangible net assets when accounted for using the purchase method of accounting. Goodwill is not amortized but reviewed for impairment. The Company's goodwill balance relates to the NWL Acquisition in fiscal 2024, the acquisition of Neeltran, Inc. in fiscal 2021, the Northeast Power Systems, Inc. ("NEPSI") acquisition in fiscal 2020, and the acquisition of Infinia Technology Corporation in fiscal 2017 and is reported in the Grid business segment. Goodwill is reviewed annually on February 28th and whenever events or changes in circumstances indicate that the carrying value of the goodwill might not be recoverable. Goodwill increased by $4.7 million during the fiscal year ended March 31, 2025, related to the NWL Acquisition. There were no changes to Goodwill during the six months ended September 30, 2025.

The Company did not identify any triggers to assess impairment in the three and six months ended September 30, 2025 or 2024.

Other Intangibles

Intangible assets at September 30, 2025 and March 31, 2025 consisted of the following (in thousands):

	*September 30, 2025*							*March 31, 2025*
	*Gross Amount*		*Accumulated Amortization*			*Net Book Value*		*Gross Amount*		*Accumulated Amortization*			*Net Book Value*		*Estimated Useful Life*
Backlog		1,381		(1,381	)		—		1,381		(1,381	)		—		2
Trade name and trademarks		1,800		—			1,800		1,800		—			1,800	Indefinite
Customer relationships		10,880		(8,332	)		2,548		10,880		(7,901	)		2,980		7-10
Core technology and know-how		5,970		(5,076	)		894		5,970		(4,834	)		1,136		5-10
Intangible assets	$	20,031	$	(14,789	)	$	5,242	$	20,031	$	(14,116	)	$	5,916

The Company recorded intangible amortization expense related to customer relationship and core technology and know-how of $0.3 million and $0.7 million in the three and six months ended September 30, 2025, respectively. The Company recorded intangible amortization expense related to customer relationship and core technology and know-how of $0.4 million and $0.8 million in the three and six months ended September 30, 2024.

Expected future amortization expense related to intangible assets is as follows (in thousands):

Years ending March 31,	*Total*
2026 (remaining)		674
2027		1,213
2028		671
2029		201
2030		128
Thereafter		555
Total	$	3,442

The Company's intangible assets relate entirely to the Grid business segment operations in the United States.

Note 15 - Leases (Tables)

6 Months Ended

Sep. 30, 2025

Assets And Liabilities Lessee [Table Text Block]

	*September 30, 2025*			*March 31, 2025*
Leases:
Right-of-use assets – Operating	$	3,789		$	3,829
Total right-of-use assets		3,789			3,829

Lease liabilities – ST Operating	$	968		$	685
Lease liabilities – LT Operating		2,681			2,684
Total lease liabilities	$	3,649		$	3,369

Weighted-average remaining lease term		4.60			4.94
Weighted-average discount rate		14.58	%		14.94	%

Lease, Cost [Table Text Block]

	*Three Months Ended*		*Six Months Ended*
	*September 30, 2025*		*September 30, 2025*
Operating Leases:
Operating lease costs – fixed	$	421	$	834
Operating lease costs – variable		45		91
Short-term lease costs		42		83
Total lease costs	$	508	$	1,008

	*Three Months Ended*		*Six Months Ended*
	*September 30, 2024*		*September 30, 2024*
Operating Leases:
Operating lease costs – fixed	$	336	$	645
Operating lease costs – variable		45		91
Short-term lease costs		39		78
Total lease costs	$	420	$	814

Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]

	*Leases*
Year ending March 31,
2026 (remaining)	$	693
2027		1,555
2028		1,003
2029		396
2030		326
Thereafter		1,227
Total minimum lease payments		5,200
Less: interest		(1,551	)
Present value of lease liabilities	$	3,649

Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues	$ 65,862	$ 54,471	$ 138,220	$ 94,761
Grid [Member]
Revenues	54,342	46,936	114,429	79,272
Grid [Member] \| Americas [Member]
Revenues	47,400	43,479	85,421	73,957
Grid [Member] \| Asia Pacific [Member]
Revenues	4,026	790	22,329	1,989
Grid [Member] \| EMEA [Member]
Revenues	2,916	2,667	6,679	3,326
Wind [Member]
Revenues	11,520	7,535	23,791	15,489
Wind [Member] \| Americas [Member]
Revenues	16	1	16	1
Wind [Member] \| Asia Pacific [Member]
Revenues	11,425	7,531	23,696	15,483
Wind [Member] \| EMEA [Member]
Revenues	79	3	79	5
Equipment and Systems [Member] \| Grid [Member]
Revenues	49,951	43,747	105,574	74,452
Equipment and Systems [Member] \| Wind [Member]
Revenues	11,223	7,166	23,103	14,591
Services and Technology Development [Member] \| Grid [Member]
Revenues	4,391	3,189	8,855	4,820
Services and Technology Development [Member] \| Wind [Member]
Revenues	$ 297	$ 369	$ 688	$ 898

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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Note 12 - Accounts Payable and Accrued Expenses (Details Textual)	6 Months Ended
	Sep. 30, 2025
Minimum [Member]
Extended Warranty Trigger Period (Year)	1 year
Maximum [Member]
Extended Warranty Trigger Period (Year)	3 years

Note 15 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Operating lease costs – fixed	$ 421	$ 336	$ 834	$ 645
Operating lease costs – variable	45	45	91	91
Short-term lease costs	42	39	83	78
Total lease costs	$ 508	$ 420	$ 1,008	$ 814

Note 14 - Contingent Consideration (Tables)

6 Months Ended

Sep. 30, 2025

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

	*June 30,*			*March 31,*
Fiscal Year 2024	*2024*			*2024*
Revenue risk premium		5.50	%		5.50	%
Revenue volatility		27.5	%		24.8	%
Stock Price	$	23.39		$	13.51
Payment delay (days)		80			80
Fair value (millions)	$	7.0		$	3.1

Note 2 - Acquisition - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025	Aug. 01, 2024
Goodwill	$ 48,164	$ 48,164
Megatran [Member]
Cash and cash equivalents			$ 400
Equity-method investments			1,200
Prepaid expenses and other current assets			1,700
Accounts receivable			16,100
Inventory			23,100
Property, plant, and equipment			28,400
Accounts payable and accrued expenses			(5,600)
Deferred revenue			(5,000)
Deferred tax liability			(5,600)
Net tangible assets/(liabilities)			54,700
Intangible assets			2,000
Goodwill			4,700
Total purchase consideration			61,400
Megatran [Member] \| Backlog [Member]
Intangible assets			700
Megatran [Member] \| Customer Relationships [Member]
Intangible assets			$ 1,300

Note 5 - Computation of Net Income Per Share of Common Stock (Details Textual) - shares	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	553,740	535,001	514,535	479,341
Performance Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	553,334	526,333	513,926	469,667
Share-Based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	406	652	609	326
Employee Stock Purchase Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		8,016		9,348

Note 9 - Inventory - Summary of Net Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Raw materials	$ 37,803	$ 35,892
Work-in-process	25,842	19,633
Finished goods	6,794	9,888
Deferred program costs	5,018	5,756
Net inventory	$ 75,457	$ 71,169

Note 3 - Revenue Recognition 2 (Details Textual) $ in Millions	Sep. 30, 2025 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	12 months
Revenue, Remaining Performance Obligation, Amount	$ 209.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01
Revenue, Remaining Performance Obligation, Amount	$ 78.2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01 \| Minimum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	13 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01 \| Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	60 months

Note 13 - Income Taxes

6 Months Ended

Sep. 30, 2025

Income Tax Disclosure [Text Block]

13. Income Taxes

The Company recorded income tax expense of $0.1 million and $0.3 million for the three and six months ended September 30, 2025, respectively, and income tax benefit of $5.0 million and $4.8 million for the three and six months ended September 30, 2024, respectively.

On July 4, 2025, the reconciliation bill, commonly referred to as the One Big Beautiful Bill ("OBBB") was signed into law, which includes a broad range of tax reform provisions that may affect the company's financial results. The OBBB allows an elective deduction for domestic Research and Development (R&D), a reinstatement of elective 100% first-year bonus depreciation, and a more favorable tax rate on Foreign-derived Deduction Eligible Income and income from non-U.S. subsidiaries (Net CFC Tested Income), among other provisions. The Company has performed an initial evaluation of the impact of the OBBB on the Company's effective tax rate and deferred tax assets in 2025 and future periods. Based on this initial evaluation, the Company believes the tax reform provisions will not have a material impact on the Company’s consolidated financial statements and related disclosures. We will continue to assess the implications of the OBBB, and our tax provision may be further impacted as additional guidance from the U.S. Department of the Treasury is released.

Accounting for income taxes requires a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if, based on the technical merits, it is more likely than not the position will be sustained upon audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. The Company re-evaluates these uncertain tax positions on a quarterly basis. The evaluation is based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, effectively settled issues under audit and new audit activity. Any changes in these factors could result in the recognition of a tax benefit or an additional charge to the tax provision. The Company did not identify any uncertain tax positions in the six months ended September 30, 2025 and did not have any gross unrecognized tax benefits as of September 30, 2025.

On a quarterly basis, the Company reassesses the valuation allowance on deferred income tax assets, weighing positive and negative evidence to assess the recoverability of the deferred tax assets. As of September 30, 2025, the Company continues to maintain a valuation allowance to reduce the U.S. federal and state deferred tax assets to the amount that will more likely than not be realized. Given the Company’s positive trend in earnings, the Company will assess during fiscal year 2025 whether sufficient positive evidence will exist to allow the Company to reach a conclusion that some or all of the U.S. valuation allowance will no longer be needed. A release of the valuation allowance would result in the recognition of deferred tax assets and a corresponding decrease to income tax expense in the period the release is recorded, the effect of which would be an increase in reported net income.

The entire disclosure for income tax.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Net income	$ 4,750	$ 4,887	$ 11,474	$ 2,363
Weighted average number of shares of common stock outstanding
Foreign currency translation loss	2	88	189	73
Comprehensive income	4,748	4,799	11,285	2,290
Total other comprehensive loss, net of tax	$ 2	$ 88	$ 189	$ 73

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

Note 6 - Goodwill and Other Intangibles (Tables)

6 Months Ended

Sep. 30, 2025

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	*September 30, 2025*							*March 31, 2025*
	*Gross Amount*		*Accumulated Amortization*			*Net Book Value*		*Gross Amount*		*Accumulated Amortization*			*Net Book Value*		*Estimated Useful Life*
Backlog		1,381		(1,381	)		—		1,381		(1,381	)		—		2
Trade name and trademarks		1,800		—			1,800		1,800		—			1,800	Indefinite
Customer relationships		10,880		(8,332	)		2,548		10,880		(7,901	)		2,980		7-10
Core technology and know-how		5,970		(5,076	)		894		5,970		(4,834	)		1,136		5-10
Intangible assets	$	20,031	$	(14,789	)	$	5,242	$	20,031	$	(14,116	)	$	5,916

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Years ending March 31,	*Total*
2026 (remaining)		674
2027		1,213
2028		671
2029		201
2030		128
Thereafter		555
Total	$	3,442

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Cash flows from operating activities:
Net income	$ 11,474	$ 2,363
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization	2,525	2,395
Stock-based compensation expense	8,292	2,072
Provision for excess and obsolete inventory	1,790	780
Amortization of operating lease right-of-use assets	601	546
Deferred income taxes	15	(5,165)
Earnings from equity method investments	(398)	0
Change in fair value of contingent consideration	0	6,682
Other non-cash items	138	(15)
Changes in operating asset and liability accounts:
Accounts receivable	6,305	2,538
Inventory	(5,982)	(6,672)
Prepaid expenses and other assets	(3,503)	(2,082)
Operating leases	(281)	(1,048)
Accounts payable and accrued expenses	2,911	(4,455)
Deferred revenue	(13,275)	18,182
Net cash provided by operating activities	10,612	16,121
Cash flows from investing activities:
Purchases of property, plant and equipment	(2,206)	(852)
Change in other assets	83	218
Net cash used in investing activities	(2,123)	(33,489)
Cash flows from financing activities:
Repurchase of treasury stock	0	(126)
Repayment of debt	0	(25)
Employee taxes paid related to net settlement of equity awards	0	(148)
Proceeds from exercise of employee stock options and ESPP	242	157
Proceeds from public equity offering, net of offering expenses	124,577	0
Net cash provided by (used in) financing activities	124,819	(142)
Net increase (decrease) in cash, cash equivalents and restricted cash	133,375	(17,494)
Cash, cash equivalents and restricted cash at beginning of period	85,381	92,280
Cash, cash equivalents and restricted cash at end of period	218,756	74,786
Effect of exchange rate changes on cash	67	16
Supplemental schedule of cash flow information:
Cash paid for income taxes, net of refunds	381	248
Non-cash investing and financing activities
Right-of-use assets obtained in exchange for new lease obligations	557	0
Postemployment Retirement Benefits [Member]
Non-cash investing and financing activities
Issuance of common stock	672	345
Megatran Acquisition [Member]
Non-cash investing and financing activities
Issuance of common stock	0	6,504
Megatran [Member]
Cash flows from operating activities:
Net income	4,500
Cash flows from investing activities:
Cash paid to settle Megatran contingent consideration liability	0	(3,278)
Cash paid for Megatran Acquisition, net of cash acquired	0	(29,577)
Non-cash investing and financing activities
Issuance of common stock	$ 0	$ 31,350

Note 11 - Equity-method Investments

6 Months Ended

Sep. 30, 2025

Equity Method Investments and Joint Ventures Disclosure [Text Block]

11. Equity-Method Investments

Investment in NWL Pacific Inc. Co., LTD

The Company has a 50% ownership in NWL Pacific Inc. Co., LTD ("NWL Pacific"). The investment represents the Company's interest in NWL Pacific. The investment is a joint venture in South Korea established on May 12, 1998.

The Company treats the equity investment in the condensed consolidated financial statements under the equity method. Equity method investments are equity securities in entities the Company does not control but over which it has the ability to exercise significant influence. These investments are accounted for under the equity method of accounting in accordance with ASC 323, Investments — Equity Method and Joint Ventures. Equity method investments are measured at cost minus impairment, if any, plus or minus the Company’s share of an investee’s income or loss, less distributions received. As of September 30, 2025 the Company did not have material accounts receivable nor accounts payable balances with NWL Pacific. The Company's investment in NWL Pacific was $1.5 million and $1.1 million as of September 30, 2025 and March 31, 2025, respectively.

The table below presents the summarized financial information for periods presented post acquisition, as provided to the Company by the investee, for the unconsolidated company (in thousands):

	*Three Months Ended September 30,*		*Six Months Ended September 30,*
	*2025*		*2025*
Net revenue	$	1,087	$	3,686
Gross profit		494		1,654
Income from operation		98		755
Net income	$	122	$	867

Note 14 - Contingent Consideration (Details Textual) - USD ($) $ in Thousands				3 Months Ended		6 Months Ended		12 Months Ended	48 Months Ended
	Sep. 30, 2024	Aug. 01, 2024	Oct. 01, 2020	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Mar. 31, 2024	Sep. 30, 2024
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease)				$ 0	$ (500)	$ 0	$ 3,400
Northeast Power Systems, Inc (NEPSI) [Member]
Payments to Acquire Businesses, Gross			$ 26,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)			873,657					399,999
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High, Number of Shares (in shares)			1,000,000
Business Combination, Contingent Consideration Arrangements, Number of Issuable Shares (in shares)	300,000				300,000		300,000	300,000	300,000
Business Combination, Separately Recognized Transactions, Revenues and Gains Recognized									$ 120,000
Megatran [Member]
Payments to Acquire Businesses, Gross		$ 30,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)		1,297,600
Business Combination, Consideration Transferred		$ 61,400
Business Combination, Contingent Consideration Arrangements, Payments to Settle Remaining Obligations	$ 3,300
Business Combination, Contingent Consideration Arrangements, Remaining Obligation to Stockholders	$ 0				$ 0		$ 0		$ 0

Note 17 - Business Segments - Operating Results for Business Segments (Details) - USD ($)
$ in Thousands

3 Months Ended

6 Months Ended

Sep. 30, 2025

Sep. 30, 2024

Sep. 30, 2025

Sep. 30, 2024

$ 65,862

$ 54,471

$ 138,220

$ 94,761

62,897

^[1],[2]

55,224

^[3],[4]

129,610

^[1],[2]

98,804

^[3],[4]

2,965

^[2]

(753)

^[4]

8,610

^[2]

(4,043)

^[4]

Income (loss) before income tax expense (benefit)

2,965

^[2]

(753)

^[4]

8,610

^[2]

(4,043)

^[4]

Interest income, net

2,269

979

3,201

2,099

Other expense, net

(367)

(329)

(21)

(489)

4,867

(103)

11,790

(2,433)

Depreciation and amortization

1,297

1,387

2,525

2,395

Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]

^[1],[2]

2,762

^[3],[4]

^[1],[2]

6,682

^[3],[4]

^[2]

(2,762)

^[4]

^[2]

(6,682)

^[4]

^[2]

(2,762)

^[4]

^[2]

(6,682)

^[4]

Grid [Member]

Grid [Member] | Operating Segments [Member]

54,342

46,936

114,429

79,272

54,342

46,936

114,429

79,272

53,064

^[1],[2]

45,366

^[3],[4]

108,994

^[1],[2]

77,939

^[3],[4]

1,278

^[2]

1,570

^[4]

5,435

^[2]

1,333

^[4]

Depreciation and amortization

1,278

^[2]

1,570

^[4]

5,435

^[2]

1,333

^[4]

1,266

1,376

2,468

2,363

Wind [Member]

Wind [Member] | Operating Segments [Member]

11,520

7,535

23,791

15,489

11,520

7,535

23,791

15,489

9,833

^[1],[2]

7,096

^[3],[4]

20,616

^[1],[2]

14,183

^[3],[4]

1,687

^[2]

439

^[4]

3,175

^[2]

1,306

^[4]

Depreciation and amortization

1,687

^[2]

439

^[4]

3,175

^[2]

1,306

^[4]

$ 31

$ 11

$ 57

$ 32

[1]	Segment other operating expense includes cost of sales, research and development expense, selling general, and administrative expense, and amortization of acquisition related intangibles.
[2]	The significant expense categories and amounts align with the segment-level information that is regularly provided to the chief operating decision maker.
[3]	Segment other operating expense includes cost of sales, research and development expense, selling general, and administrative expense, amortization of acquisition related intangibles, and gain/loss on contingent consideration.
[4]	The significant expense categories and amounts align with the segment-level information that is regularly provided to the chief operating decision maker.

Note 13 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Tax Expense (Benefit)	$ 117	$ (4,990)	$ 316	$ (4,796)
Liability for Uncertainty in Income Taxes, Current	0		0
Unrecognized Tax Benefits	$ 0		$ 0

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Note 6 - Goodwill and Other Intangibles - Expected Future Amortization Expense (Details) $ in Thousands	Sep. 30, 2025 USD ($)
2026 (remaining)	$ 674
2027	1,213
2028	671
2029	201
2030	128
Thereafter	555
Total	$ 3,442

Note 2 - Acquisition

6 Months Ended

Sep. 30, 2025

Business Combination [Text Block]

2. Acquisition

Acquisition of NWL

On August 1, 2024 (the "Acquisition Date"), the Company entered into a Stock Purchase Agreement (the “Stock Purchase Agreement”) with the selling stockholders named therein. Pursuant to the terms of the Stock Purchase Agreement and concurrently with entering into such agreement, the Company acquired all of the issued and outstanding shares of capital stock of Megatran Industries, Inc. ("Megatran") (the "NWL Acquisition"). Megatran's wholly-owned subsidiary, NWL, Inc. (together with Megatran, "NWL"), is a U.S.-based global provider of engineered power conversion solutions for demanding industrial and military applications.

The NWL Acquisition has been accounted for under the purchase method of accounting in accordance with ASC 805, Business Combinations. The Company allocated the purchase price to the assets acquired and liabilities assumed at their estimated fair values as of the Acquisition Date. The excess of the purchase price paid by the Company over the estimated fair value of net assets acquired has been recorded as goodwill.

The total purchase price of approximately $61.4 million includes the fair value of shares of the Company’s common stock issued at closing, and cash paid, as follows (in millions):

Cash payments	$30.0
Issuance of 1,297,600 shares of Company’s common stock	$31.4

At the Acquisition Date, in addition to the $30.0 million cash, the Company valued the Company’s common stock, using $24.16 per share, which was the closing price on the day prior to the day that the Company completed the NWL Acquisition. Acquisition costs of $1.1 million were included in selling, general and administrative ("SG&A") for the fiscal year ended March 31, 2025.

The following table summarizes the allocation of the purchase price based on the estimated fair values of the assets acquired and liabilities assumed and related deferred income taxes in connection with the NWL Acquisition as of the Acquisition Date and reflective of measurement period adjustments (in millions):

Cash and cash equivalents	$	0.4
Equity-method investments		1.2
Prepaid expenses and other current assets		1.7
Accounts receivable		16.1
Inventory		23.1
Property, plant, and equipment		28.4
Accounts payable and accrued expenses		(5.6	)
Deferred revenue		(5.0	)
Deferred tax liability		(5.6	)
Net tangible assets/(liabilities)		54.7

Backlog		0.7
Customer relationships		1.3
Net identifiable intangible assets		2.0

Goodwill		4.7

Total purchase consideration	$	61.4

The fair value of the financial assets acquired includes receivables with a fair value of $16.1 million. The gross amount due is $16.9 million, of which $0.8 million is expected to be uncollectible.

Inventory includes a $0.7 million adjustment to step up the inventory balance to fair value consistent with the purchase price allocation. The fair value was determined based on the estimated selling price of the inventory, less the remaining manufacturing and selling cost and a normal profit margin on those manufacturing and selling efforts. The inventory step up adjustment increased cost of revenue $0.7 million for the fiscal year ended March 31, 2025 as the inventory was sold.

Backlog of $0.7 million was evaluated using the multi period excess earnings method under the income approach. The contracts with customers do not provide for any guarantees to source all future requirements from the Company. The amortization method being utilized is economic consumption estimated over an eight-month period with the expense being allocated to cost of revenues.

Customer relationships of $1.3 million relates to customers currently under contract and was determined based on a multi period excess earnings method under the income approach. The method of amortization being utilized is straight line over 10 years, as the results were not materially different from the economic consumption method, with the expense being allocated to SG&A.

Goodwill represents the value associated with the acquired workforce and expected synergies related to the business combination of the two companies. Goodwill resulting from the NWL Acquisition was assigned to the Company’s Grid business segment. Goodwill recognized in the NWL Acquisition is not deductible for tax purposes.

Unaudited Pro Forma Operating Results

The unaudited pro forma condensed consolidated statement of operations for the three and six months ended September 30, 2024 presented as if the NWL Acquisition had occurred on April 1, 2024, is as follows:

	*Three Months Ended September 30, 2024*		*Six Months Ended September 30, 2024*
Net Revenue	$	58,722	$	118,032
Operating income (loss)		81		(4,079	)
Net income (loss)	$	635	$	(2,748	)

Net income per common share
Basic	$	0.02	$	(0.07	)
Diluted	$	0.02	$	(0.07	)
Shares - basic		37,404		37,189
Shares - diluted		37,950		37,189

The pro forma amounts include the historical operating results of the Company and NWL with appropriate adjustments that give effect to acquisition related costs, income taxes, intangible amortization resulting from the NWL Acquisition and certain conforming accounting policies of the Company. The pro forma amounts are not necessarily indicative of the operating results that would have occurred if the NWL Acquisition and related transactions had been completed at the beginning of the applicable periods presented. In addition, the pro forma amounts are not necessarily indicative of operating results in future periods.

NWL contributed $16.4 million of revenue and $2.0 million in net income for the Company for the three months ended September 30, 2025. NWL contributed $34.1 million of revenue and $4.5 million in net income for the Company for the six months ended September 30, 2025. Amortization expense of less than $0.1 million and $0.1 million is included in the three and six months ended September 30, 2025, respectively, as a result of the acquired intangible assets from the NWL Acquisition.

The entire disclosure for business combination.

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Note 11 - Equity-Method Investments - Schedule of Equity Method Investment Summarized Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Gross profit	$ 20,439		$ 15,613		$ 44,928	$ 27,838
Net Income (Loss) Attributable to Parent	4,750	$ 6,724	$ 4,887	$ (2,524)	11,474	$ 2,363
NWL Pacific Inc. Co., LTD [Member]
Revenues	1,087				3,686
Gross profit	494				1,654
Income from operation	98				755
Net Income (Loss) Attributable to Parent	$ 122				$ 867

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Note 9 - Inventory (Tables)

6 Months Ended

Sep. 30, 2025

Schedule of Inventory, Current [Table Text Block]

	*September 30, 2025*		*March 31, 2025*
Raw materials	$	37,803	$	35,892
Work-in-process		25,842		19,633
Finished goods		6,794		9,888
Deferred program costs		5,018		5,756
Net inventory	$	75,457	$	71,169

Unaudited Condensed Consolidated Statements of Operations - USD ($)
$ in Thousands

3 Months Ended

6 Months Ended

Sep. 30, 2025

Sep. 30, 2024

Sep. 30, 2025

Sep. 30, 2024

Selling, general and administrative

$ 65,862

$ 54,471

$ 138,220

$ 94,761

Cost of revenues

45,423

38,858

93,292

66,923

Gross margin

20,439

15,613

44,928

27,838

Operating expenses:

Research and development

3,729

2,646

8,033

4,931

13,408

10,525

27,611

19,423

Amortization of acquisition-related intangibles

337

433

674

845

Change in fair value of contingent consideration

2,762

6,682

Total operating expenses

17,474

16,366

36,318

31,881

Operating income (loss)

2,965

^[1]

(753)

^[2]

8,610

^[1]

(4,043)

^[2]

Interest income, net

2,269

979

3,201

2,099

Other expense, net

(367)

(329)

(21)

(489)

Income (loss) before income tax expense (benefit)

4,867

(103)

11,790

(2,433)

Income tax expense (benefit)

117

(4,990)

316

(4,796)

Net income

$ 4,750

$ 4,887

$ 11,474

$ 2,363

Net income per share of common stock

Basic (in dollars per share)

$ 0.11

$ 0.13

$ 0.28

$ 0.07

Diluted (in dollars per share)

$ 0.11

$ 0.13

$ 0.27

$ 0.06

Weighted average number of shares of common stock outstanding

Basic (in shares)

43,242

36,952

41,070

36,317

Diluted (in shares)

44,210

37,499

41,988

36,951

[1]	The significant expense categories and amounts align with the segment-level information that is regularly provided to the chief operating decision maker.
[2]	The significant expense categories and amounts align with the segment-level information that is regularly provided to the chief operating decision maker.

Note 16 - Commitments and Contingencies

6 Months Ended

Sep. 30, 2025

Commitments and Contingencies Disclosure [Text Block]

16. Commitments and Contingencies

Legal Contingencies

From time to time, the Company is involved in legal and administrative proceedings and claims of various types. The Company records a liability in its condensed consolidated financial statements for these matters when a loss is known or considered probable and the amount can be reasonably estimated. The Company reviews these estimates each accounting period as additional information is known and adjusts the loss provision when appropriate. If a matter is both probable to result in a liability and the amounts of loss can be reasonably estimated, the Company estimates and discloses the possible loss or range of loss to the extent necessary to make the condensed consolidated financial statements not misleading. If the loss is not probable or cannot be reasonably estimated, a liability is not recorded in its condensed consolidated financial statements.

Other

The Company enters into long-term construction contracts with customers that require the Company to obtain performance bonds. The Company is required to deposit an amount equivalent to some or all the face amount of the performance bonds into an escrow account until the termination of the bond. When the performance conditions are met, amounts deposited as collateral for the performance bonds are returned to the Company. In addition, the Company has various contractual arrangements in which minimum quantities of goods or services have been committed to be purchased on an annual basis.

As of September 30, 2025, the Company had $3.0 million of restricted cash included in long-term assets and $2.9 million of restricted cash included in current assets. As of March 31, 2025, the Company had $4.3 million of restricted cash included in long term assets and $1.6 million of restricted cash included in current assets. These amounts included in restricted cash primarily represent deposits to secure letters of credit for various supply contracts and long-term projects or collateral deposits. These deposits are held in interest bearing accounts.

Document And Entity Information - shares	6 Months Ended
Document And Entity Information - shares	Sep. 30, 2025	Oct. 31, 2025
Document Information [Line Items]
Entity Central Index Key	0000880807
Entity Registrant Name	AMERICAN SUPERCONDUCTOR CORP /DE/
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2026
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2025
Document Transition Report	false
Entity File Number	0-19672
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	04-2959321
Entity Address, Address Line One	114 East Main St.
Entity Address, City or Town	Ayer
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01432
City Area Code	978
Local Phone Number	842-3000
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	AMSC
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		45,186,789

Note 5 - Computation of Net Income Per Share of Common Stock

6 Months Ended

Sep. 30, 2025

Earnings Per Share [Text Block]

5. Computation of Net Income per Share of Common Stock

Basic net income per share (“EPS”) is computed by dividing net income by the weighted-average number of common shares outstanding for the period. Where applicable, diluted EPS is computed by dividing the net income by the weighted-average number of common shares and dilutive common equivalent shares outstanding during the period, calculated using the treasury stock method. Common equivalent shares include the effect of restricted stock, exercise of stock options and warrants and contingently issuable shares. Stock options and warrants that are out-of-the-money with exercise prices greater than the average market price of the underlying common shares and shares of performance-based restricted stock where the contingency was not met are excluded from the computation of diluted EPS as the effect of their inclusion would be anti-dilutive. For the three months ended September 30, 2025, 553,740 shares were not included in the calculation of diluted EPS. Of these, 553,334 were shares of performance-based restricted stock where the contingency was not met and 406 shares relate to outstanding stock options that were considered anti-dilutive. For the six months ended September 30, 2025, 514,535 shares were not included in the calculation of diluted EPS. Of these, 513,926 were shares of performance-based restricted stock where the contingency was not met and 609 shares relate to outstanding stock options that were considered anti-dilutive. For the three months ended September 30, 2024, 535,001 shares were not included in the calculation of diluted EPS. Of these, 526,333 were shares of performance-based restricted stock where the contingency was not met. Of the remaining shares, 652 shares relate to outstanding stock awards that were considered anti-dilutive, and 8,016 shares related to ESPP shares and were excluded as they were considered anti-dilutive. For the six months ended September 30, 2024, 479,341 shares were not included in the calculation of diluted EPS. Of these, 469,667 were shares of performance-based restricted stock where the contingency was not met. Of the remaining shares, 326 shares relate to outstanding stock awards that were considered anti-dilutive, and 9,348 shares related to ESPP shares and were excluded as they were considered anti-dilutive.

The following table reconciles the numerators and denominators of the earnings per share calculation for the three and six months ended September 30, 2025, and 2024 (in thousands, except per share data):

	*Three Months Ended September 30,*						*Six Months Ended September 30,*
	*2025*			*2024*			*2025*			*2024*
Numerator:
Net income	$	4,750		$	4,887		$	11,474		$	2,363
Denominator:
Weighted-average shares of common stock outstanding		45,170			37,931			43,028			37,463
Weighted-average shares subject to repurchase		(1,928	)		(979	)		(1,958	)		(1,146	)
Shares used in per-share calculation ― basic		43,242			36,952			41,070			36,317
Shares used in per-share calculation ― diluted		44,210			37,499			41,988			36,951
Net income per share ― basic	$	0.11		$	0.13		$	0.28		$	0.07
Net income per share ― diluted	$	0.11		$	0.13		$	0.27		$	0.06

Note 12 - Accounts Payable and Accrued Expenses - Product Warranty Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Balance at beginning of period	$ 3,240	$ 2,542	$ 3,033	$ 2,363
Acquired warranty obligations	0	637	0	637
Provisions for warranties during the period	520	298	1,069	774
Settlements during the period	(426)	(367)	(768)	(664)
Balance at end of period	$ 3,334	$ 3,110	$ 3,334	$ 3,110

Insider Trading Arrangements

6 Months Ended

Sep. 30, 2025

Trading Arrangements, by Individual [Table]

Material Terms of Trading Arrangement [Text Block]

ITEM 5.

OTHER INFORMATION

(a) None

(b) None

(c) On August 15, 2025, Daniel P. McGahn, Chairman, President and Chief Executive Officer, adopted a Rule 10b5-1 trading arrangement that is intended to satisfy the affirmative defense of Rule 10b5-1(c) for the sale of up to 111,205 shares of the Company’s common stock until the earlier of (i) August 14, 2026, or (ii) the date in which all shares under the trading arrangement are sold.

On August 15, 2025, John W. Kosiba, Jr., Senior Vice President, Chief Financial Officer and Treasurer, adopted a Rule 10b5-1 trading arrangement that is intended to satisfy the affirmative defense of Rule 10b5-1(c) for the sale of up to 48,512 shares of the Company’s common stock until the earlier of (i) August 14, 2026, or (ii) the date in which all shares under the trading arrangement are sold.

Non-Rule 10b5-1 Arrangement Adopted [Flag]

false

Rule 10b5-1 Arrangement Terminated [Flag]

false

Non-Rule 10b5-1 Arrangement Terminated [Flag]

false

Daniel P. McGahn [Member]

Trading Arrangements, by Individual [Table]

Trading Arrangement, Securities Aggregate Available Amount

111,205

Trading Arrangement Adoption Date

August 15, 2025

Trading Arrangement, Individual Name

Daniel P. McGahn

Trading Arrangement, Individual Title

Chairman, President and Chief Executive Officer

Rule 10b5-1 Arrangement Adopted [Flag]

true

John W. Kosiba, Jr. [Member]

Trading Arrangements, by Individual [Table]

Trading Arrangement, Securities Aggregate Available Amount

48,512

Trading Arrangement Adoption Date

August 15, 2025

Trading Arrangement, Individual Name

John W. Kosiba, Jr.

Trading Arrangement, Individual Title

Senior Vice President, Chief Financial Officer and Treasurer

Rule 10b5-1 Arrangement Adopted [Flag]

true

Note 17 - Business Segments (Details Textual) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)
Number of Reportable Segments			2
Number of Operating Segments			2
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease)	$ 0	$ (500)	$ 0	$ 3,400
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease)		$ 2,800		$ 6,700

Note 7 - Fair Value Measurements

6 Months Ended

Sep. 30, 2025

Fair Value Disclosures [Text Block]

7. Fair Value Measurements

A valuation hierarchy for disclosure of the inputs to valuation used to measure fair value has been established. This hierarchy prioritizes the inputs into three broad levels as follows:

Level 1	-	Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.

Level 2	-	Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs).

Level 3	-	Unobservable inputs that reflect the Company’s assumptions that market participants would use in pricing the asset or liability. The Company develops these inputs based on the best information available, including its own data.

The Company provides a gross presentation of activity within Level 3 measurement roll-forward and details of transfers in and out of Level 1 and 2 measurements. A change in the hierarchy of an investment from its current level is reflected in the period during which the pricing methodology of such investment changes. Disclosure of the transfer of securities from Level 1 to Level 2 or Level 3 is made in the event that the related security is significant to total cash and investments. The Company did not have any transfers of assets and liabilities from Level 1, Level 2 or Level 3 of the fair value measurement hierarchy during the three or six months ended September 30, 2025.

A financial asset’s or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

Valuation Techniques

Cash Equivalents

Cash equivalents consist of highly liquid instruments with maturities of three months or less that are regarded as high quality, low risk investments and are measured using such inputs as quoted prices, and are classified within Level 1 of the valuation hierarchy. Cash equivalents consist principally of money market accounts.

Short-term Cash Instruments

Short-term cash instruments consist of highly liquid instruments with maturities of three months or less that are regarded as high quality, low risk investments and are measured using such inputs as quoted prices in markets that are not active, and are classified within Level 2 of the valuation hierarchy. Short-term cash instruments consist principally of certificates of deposits.

The following table provides the assets and liabilities carried at fair value on a recurring basis, measured as of September 30, 2025 and March 31, 2025 (in thousands):

	*Total Carrying Value*		*Quoted Prices in Active Markets (Level 1)*		*Significant Other Observable Inputs (Level 2)*		*Significant Unobservable Inputs (Level 3)*
September 30, 2025:
Assets:
Cash equivalents	$	177,543	$	177,543	$	—	$	—
Short-term cash instruments	$	1,351	$	—	$	1,351	$	—

	*Total Carrying Value*		*Quoted Prices in Active Markets (Level 1)*		*Significant Other Observable Inputs (Level 2)*		*Significant Unobservable Inputs (Level 3)*
March 31, 2025
Assets:
Cash equivalents	$	51,230	$	51,230	$	—	$	—
Short-term cash instruments	$	1,404	$	—	$	1,404	$	—

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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