0001437749-23-022793 | 10-Q | XBRL Viewer | American Superconductor Corp DE

Inventory Disclosure [Text Block]

8. Inventory

Inventory, net of reserves, at June 30, 2023 and March 31, 2023 consisted of the following (in thousands):

	*June 30, 2023*		*March 31, 2023*
Raw materials	$	19,141	$	16,654
Work-in-process		17,294		15,200
Finished goods		4,453		2,996
Deferred program costs		1,986		2,136
Net inventory	$	42,874	$	36,986

The Company recorded inventory write-downs of $0.4 million and $0.3 million for the three months ended June 30, 2023 and 2022, 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 June 30, 2023 and March 31, 2023, primarily represent costs incurred on programs where the Company needs to complete performance obligations before the related revenue and costs will be recognized.

Note 15 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating lease costs - fixed	$ 259	$ 242
Operating lease costs - variable	40	38
Short-term lease costs	37	31
Total lease costs	$ 336	$ 311

Note 13 - Contingent Consideration - Summary of the Key Assumptions Used to Calculate Fair Value of Warrants (Details) $ in Millions	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)
Fair value (millions)	$ 2.6	$ 1.3	$ 0.9	$ 1.1	$ 1.4	$ 1.2
Measurement Input, Revenue Risk Premium [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	5.20	5.30	5.30	5.20	6.60	6.50
Measurement Input, Revenue Volatility [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	23	25	25	25	30	33
Measurement Input, Share Price [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	6.26	4.91	3.68	4.38	5.18	7.61
Measurement Input, Payment Delay [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	80	80	80	80	80	80

Note 1 - Nature of the Business and Operations and Liquidity	3 Months Ended
Jun. 30, 2023
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. Nature of the Business and Operations and Liquidity *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 that 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. 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 financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those instructions. The year-end condensed 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 June 30, 2023 and 2022 and the financial position at June 30, 2023; 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, 2023, and notes thereto, included in the Company’s Annual Report on Form 10-K for the year ended March 31, 2023 filed with the SEC on May 31, 2023. *Liquidity* The Company has historically experienced recurring operating losses and as of June 30, 2023, the Company had an accumulated deficit of $1,061 million. In addition, the Company has historically experienced recurring negative operating cash flows. At June 30, 2023, the Company had cash and cash equivalents of $22.0 million. Cash used in operations for the three months ended June 30, 2023 was $2.2 million. In February 2021, the Company filed a shelf registration statement on Form S-3 that will expire in February 2024 (the “Form S-3”). The Form S-3 allows the Company to offer and sell from time-to-time up to $250 million of common stock, debt securities, warrants or units comprised of any combination of these securities. The Form S-3 is intended to provide the Company flexibility to conduct registered sales of the Company's securities, subject to market conditions, in order to fund the Company's future capital needs. The terms of any future offering under the Form S-3 will be established at the time of such offering and will be described in a prospectus supplement filed with the SEC prior to the completion of any such offering. The Company continues to experience inflationary pressure in its supply chain and some delays in sourcing materials needed for its products resulting in some production disruption, both of which have increased the Company’s cost of revenues and decreased gross margin. While the impact of inflation has been challenging, the Company continues to take actions to limit this pressure, including adjusting the pricing of its products and services. Changes in macroeconomic conditions arising from the COVID-19 pandemic or for other reasons, such as the ongoing war between Russia and Ukraine, inflation, rising interest rates, labor force availability, sourcing, material delays and global supply chain disruptions could have a material adverse effect on the Company’s business, financial condition and results of operation. From time-to-time the Company may undertake restructuring activities in order to align the global organization in a manner that the Company believes will better position it to achieve its long-term goals. In January 2023, the Company undertook a reduction in force that involved approximately 5% of the global workforce. This restructuring is expected to incur $1.0 million of cash expenses, $0.7 million of which has been paid as of June 30, 2023, and to result in annualized cost savings of approximately $5.0 million, beginning in fiscal 2023. The Company believes that based on the information presented above and its quarterly management assessment, it has sufficient liquidity to fund its operations and capital expenditures for the next twelve months following the issuance of the financial statements for the three months ended June 30, 2023. The Company’s liquidity is highly dependent on its ability to increase revenues, its ability to control its operating costs, and its ability to raise additional capital, if necessary. The impact of the COVID-19 pandemic and other sources of instability, including the war between Russia and Ukraine, on the global financing markets may reduce the Company's ability to raise additional capital, if necessary, which could negatively impact the Company's liquidity. There can be no assurance that the Company will be able to continue to raise additional capital, on favorable terms or at all, from other sources or execute on any other means of improving liquidity described above.

Note 1 - Nature of the Business and Operations and Liquidity

3 Months Ended

Jun. 30, 2023

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

1. Nature of the Business and Operations and Liquidity

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 that 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. 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 financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those instructions. The year-end condensed 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 June 30, 2023 and 2022 and the financial position at June 30, 2023; 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, 2023, and notes thereto, included in the Company’s Annual Report on Form 10-K for the year ended March 31, 2023 filed with the SEC on May 31, 2023.

Liquidity

The Company has historically experienced recurring operating losses and as of June 30, 2023, the Company had an accumulated deficit of $1,061 million. In addition, the Company has historically experienced recurring negative operating cash flows. At June 30, 2023, the Company had cash and cash equivalents of $22.0 million. Cash used in operations for the three months ended June 30, 2023 was $2.2 million.

In February 2021, the Company filed a shelf registration statement on Form S-3 that will expire in February 2024 (the “Form S-3”). The Form S-3 allows the Company to offer and sell from time-to-time up to $250 million of common stock, debt securities, warrants or units comprised of any combination of these securities. The Form S-3 is intended to provide the Company flexibility to conduct registered sales of the Company's securities, subject to market conditions, in order to fund the Company's future capital needs. The terms of any future offering under the Form S-3 will be established at the time of such offering and will be described in a prospectus supplement filed with the SEC prior to the completion of any such offering.

The Company continues to experience inflationary pressure in its supply chain and some delays in sourcing materials needed for its products resulting in some production disruption, both of which have increased the Company’s cost of revenues and decreased gross margin. While the impact of inflation has been challenging, the Company continues to take actions to limit this pressure, including adjusting the pricing of its products and services. Changes in macroeconomic conditions arising from the COVID-19 pandemic or for other reasons, such as the ongoing war between Russia and Ukraine, inflation, rising interest rates, labor force availability, sourcing, material delays and global supply chain disruptions could have a material adverse effect on the Company’s business, financial condition and results of operation.

From time-to-time the Company may undertake restructuring activities in order to align the global organization in a manner that the Company believes will better position it to achieve its long-term goals. In January 2023, the Company undertook a reduction in force that involved approximately 5% of the global workforce. This restructuring is expected to incur $1.0 million of cash expenses, $0.7 million of which has been paid as of June 30, 2023, and to result in annualized cost savings of approximately $5.0 million, beginning in fiscal 2023.

The Company believes that based on the information presented above and its quarterly management assessment, it has sufficient liquidity to fund its operations and capital expenditures for the next twelve months following the issuance of the financial statements for the three months ended June 30, 2023. The Company’s liquidity is highly dependent on its ability to increase revenues, its ability to control its operating costs, and its ability to raise additional capital, if necessary. The impact of the COVID-19 pandemic and other sources of instability, including the war between Russia and Ukraine, on the global financing markets may reduce the Company's ability to raise additional capital, if necessary, which could negatively impact the Company's liquidity. There can be no assurance that the Company will be able to continue to raise additional capital, on favorable terms or at all, from other sources or execute on any other means of improving liquidity described above.

Note 6 - Fair Value Measurements - Derivative Liability Measured at Fair value (Details) - Derivative Financial Instruments, Liabilities [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2023	Mar. 31, 2023
Balance	$ 1,270	$ 1,200
Change in fair value	1,350	70
Balance	$ 2,620	$ 1,270

Note 2 - Revenue Recognition 2 (Details Textual) $ in Millions	Jun. 30, 2023 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	12 months
Revenue, Remaining Performance Obligation, Amount	$ 123.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01
Revenue, Remaining Performance Obligation, Amount	$ 41.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01 \| 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]: 2024-07-01 \| Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	60 months

Note 13 - Contingent Consideration (Details Textual) - USD ($) $ in Thousands		3 Months Ended
	Oct. 01, 2020	Jun. 30, 2023	Jun. 30, 2022
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		$ 1,350	$ 170
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
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High, Number of Shares (in shares)	1,000,000	1,000,000

Note 9 - Prepaid and Other Current Assets (Details Textual) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Jun. 30, 2023	Jun. 30, 2021	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2023	Dec. 31, 2022
Employee Retention Credits Receivable						$ 3.3
Proceeds From Employee Retention Credit	$ 2.2
Cost of Sales [Member]
Employee Retention Credits Benefit					$ 1.8
Selling, General and Administrative Expenses [Member]
Employee Retention Credits Benefit					0.8
Research and Development Expense [Member]
Employee Retention Credits Benefit					0.7
Prepaid Expenses and Other Current Assets [Member]
Employee Retention Credits Receivable					$ 3.3
Maximum [Member]
Percentage of Qualified Wages Paid		70.00%	70.00%	50.00%

Note 7 - Accounts Receivable (Tables)

3 Months Ended

Jun. 30, 2023

Accounts Receivable [Table Text Block]

	*June 30, 2023*		*March 31, 2023*
Accounts receivable (billed)	$	24,544	$	20,707
Accounts receivable (unbilled)		5,572		9,958
Accounts receivable, net	$	30,116	$	30,665

Note 15 - Leases (Details Textual) - USD ($)	Jun. 30, 2023	Mar. 31, 2023
Property and Equipment, Net [Member]
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total	$ 0	$ 1,000
Property and Equipment, Net [Member] \| Neeltran Inc. [Member]
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total	$ 13,200
Maximum [Member]
Lessee, Operating Lease, Renewal Term (Year)	5 years

Note 15 - Leases (Tables)

3 Months Ended

Jun. 30, 2023

Assets And Liabilities Lessee [Table Text Block]

	*June 30, 2023*			*March 31, 2023*
Leases:
Right-of-use assets - Financing	$	-			1
Right-of-use assets - Operating		2,694			2,857
Total right-of-use assets		2,694			2,858

Lease liabilities - ST Financing	$	-			1
Lease liabilities - ST Operating		781			807
Lease liabilities - LT Operating		2,047			2,184
Total lease liabilities	$	2,828			2,992

Weighted-average remaining lease term		3.79 years			3.95 years
Weighted-average discount rate		6.67	%		6.46	%

Lease, Cost [Table Text Block]

	*Three Months Ended*
	*June 30, 2023*
Operating Leases:
Operating lease costs - fixed	$	259
Operating lease costs - variable		40
Short-term lease costs		37
Total lease costs	$	336

	*Three Months Ended*
	*June 30, 2022*
Operating Leases:
Operating lease costs - fixed	$	242
Operating lease costs - variable		38
Short-term lease costs		31
Total lease costs	$	311

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

	*Leases*
Year ended March 31,
2024	$	519
2025		793
2026		732
2027		592
2028		369
Thereafter		3
Total minimum lease payments		3,008
Less: interest		180
Present value of lease liabilities	$	2,828

Note 15 - Leases - Operating Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Right-of-use assets	$ 2,694	$ 2,857
Total right-of-use assets	2,694	2,858
Total lease liabilities	2,828	$ 2,992
Weighted-average remaining lease term (Year)		3 years 9 months 14 days
Weighted-average discount rate		6.46%
Property and Equipment, Net [Member]
Right-of-use assets - Financing	0	$ 1
Lease Liability Current Portion [Member]
Lease liabilities - ST Financing	0	1
Lease liabilities - ST Operating	781	807
Lease Liability Long Term Portion [Member]
Lease liabilities - LT Operating	$ 2,047	$ 2,184

Note 10 - Property, Plant and Equipment

3 Months Ended

Jun. 30, 2023

Property, Plant and Equipment Disclosure [Text Block]

10. Property, Plant and Equipment

The cost and accumulated depreciation of property, plant and equipment at June 30, 2023 and March 31, 2023 are as follows (in thousands):

	*June 30, 2023*			*March 31, 2023*
Land	$	980		$	980
Construction in progress - equipment		687			748
Buildings		5,416			5,416
Equipment and software		43,416			43,156
Finance lease - right of use asset		—			1
Furniture and fixtures		1,535			1,535
Leasehold improvements		6,815			6,815
Property, plant and equipment, gross		58,849			58,651
Less accumulated depreciation		(46,902	)		(46,342	)
Property, plant and equipment, net	$	11,947		$	12,309

Depreciation expense was $0.6 million and $0.7 million for the three months ended June 30, 2023 and 2022, respectively.

Note 8 - Inventory (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Inventory Write-down	$ 384	$ 346

Note 16 - Commitments and Contingencies

3 Months Ended

Jun. 30, 2023

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 June 30, 2023, the Company had $0.6 million of restricted cash included in long-term assets and $0.5 million of restricted cash included in current assets. As of March 31, 2023, the Company had $0.6 million of restricted cash included in long term assets and $1.7 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.

Note 5 - Goodwill and Other Intangibles

3 Months Ended

Jun. 30, 2023

Goodwill and Intangible Assets Disclosure [Text Block]

5. 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. 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.

There were no changes to goodwill during the three months ended June 30, 2023 or year ended March 31, 2023.

The Company did not identify any triggering events in the three months ended June 30, 2023 that would require interim impairment testing of goodwill.

Other Intangibles

Intangible assets at June 30, 2023 and March 31, 2023 consisted of the following (in thousands):

	*June 30, 2023*							*March 31, 2023*
	*Gross Amount*		*Accumulated Amortization*			*Net Book Value*		*Gross Amount*		*Accumulated Amortization*			*Net Book Value*		*Estimated Useful Life*
Licenses	$	3,610	$	(3,610	)	$	—	$	3,610	$	(3,610	)	$	—		7
Backlog		681		(681	)		—		681		(675	)	$	6		2
Trade name and trademarks		1,800		—			1,800		1,800		—			1,800		Indefinite
Customer relationships		9,600		(5,397	)		4,203		9,600		(4,980	)		4,620		7
Core technology and know-how		5,970		(3,990	)		1,980		5,970		(3,869	)		2,101		5-10
Intangible assets	$	21,661	$	(13,678	)	$	7,983	$	21,661	$	(13,134	)	$	8,527

The Company recorded intangible amortization expense related to customer relationship and core technology and know-how of $0.5 million and $0.7 million, in the three months ended June 30, 2023 and 2022 respectively. Additionally, the Company recorded intangible amortization related to backlog that is reported in cost of revenues of less than $0.1 million in each of the three months ended June 30, 2023 and 2022.

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

Years ended March 31,	*Total*
2024		1,614
2025		1,648
2026		1,221
2027		1,085
2028		543
Thereafter		72
Total	$	6,183

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

Note 4 - Computation of Net Loss Per Common Share - Reconciliation of Numerators and Denominators of EPS Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Net loss	$ (5,398)	$ (8,710)
Weighted-average shares of common stock outstanding (in shares)	29,706	28,520
Weighted-average shares subject to repurchase (in shares)	(1,448)	(960)
Shares used in per-share calculation ? basic (in shares)	28,258	27,560
Shares used in per-share calculation ? diluted (in shares)	28,258	27,560
Net loss per share ? basic (in dollars per share)	$ (0.19)	$ (0.32)
Net loss per share ? diluted (in dollars per share)	$ (0.19)	$ (0.32)

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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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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

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Note 11 - Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Accounts payable	$ 10,878	$ 13,935
Accrued inventories in-transit	2,023	2,267
Accrued other miscellaneous expenses	3,646	3,870
Accrued contract loss	3,530	3,464
Advanced deposits	1,730	5,653
Accrued compensation	4,443	5,430
Income taxes payable	256	409
Accrued product warranty	1,926	2,638
Accrued restructuring	396	717
Total	$ 28,828	$ 38,383

Note 3 - Stock-based Compensation (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Restricted Stock [Member]
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares)	672,500
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 7.7
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	2 years 2 months 12 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)	53,675	25,806
Share-Based Payment Arrangement, Option [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
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	10 months 24 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)	0	20,564

Note 4 - Computation of Net Loss Per Common Share

3 Months Ended

Jun. 30, 2023

Earnings Per Share [Text Block]

4. Computation of Net Loss per Common Share

Basic net loss per share (“EPS”) is computed by dividing net loss by the weighted-average number of common shares outstanding for the period. Where applicable, diluted EPS is computed by dividing the net loss 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 each of the three months ended June 30, 2023, and 2022, 1.1 million shares were not included in the calculation of diluted EPS. Of these, 1.0 million relate to shares tied to the derivative liability for which the contingency has not yet been met, and 0.1 million relate to outstanding stock options as they were considered anti-dilutive.

The following table reconciles the numerators and denominators of the earnings per share calculation for the three months ended June 30, 2023 and 2022 (in thousands, except per share data):

	*Three Months Ended June 30,*
	*2023*			*2022*
Numerator:
Net loss	$	(5,398	)	$	(8,710	)
Denominator:
Weighted-average shares of common stock outstanding		29,706			28,520
Weighted-average shares subject to repurchase		(1,448	)		(960	)
Shares used in per-share calculation ― basic		28,258			27,560
Shares used in per-share calculation ― diluted		28,258			27,560
Net loss per share ― basic	$	(0.19	)	$	(0.32	)
Net loss per share ― diluted	$	(0.19	)	$	(0.32	)

Note 5 - Goodwill and Other Intangibles - Expected Future Amortization Expense (Details) $ in Thousands	Jun. 30, 2023 USD ($)
2024	$ 1,614
2025	1,648
2026	1,221
2027	1,085
2028	543
Thereafter	72
Total	$ 6,183

Note 4 - Computation of Net Loss Per Common Share (Tables)

3 Months Ended

Jun. 30, 2023

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

	*Three Months Ended June 30,*
	*2023*			*2022*
Numerator:
Net loss	$	(5,398	)	$	(8,710	)
Denominator:
Weighted-average shares of common stock outstanding		29,706			28,520
Weighted-average shares subject to repurchase		(1,448	)		(960	)
Shares used in per-share calculation ― basic		28,258			27,560
Shares used in per-share calculation ― diluted		28,258			27,560
Net loss per share ― basic	$	(0.19	)	$	(0.32	)
Net loss per share ― diluted	$	(0.19	)	$	(0.32	)

Note 10 - Property, Plant and Equipment (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Depreciation, Depletion and Amortization	$ 0.6	$ 0.7

Note 2 - Revenue Recognition

3 Months Ended

Jun. 30, 2023

Revenue from Contract with Customer [Text Block]

2. Revenue Recognition

The Company’s revenues in its Grid business 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 business 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 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. In the three months ended June 30, 2023, and 2022, 76% and 70% of revenue, respectively, 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.

The Company's equipment and system product line includes certain contracts which do not meet the requirements of an exchange transaction and therefore do not fall within the scope of ASC 606. As these non-exchange transaction contracts are considered grant revenue and do not fall within any specific accounting literature, the Company follows guidance within ASC 606 by analogy to recognize grant revenue over time. The Company recorded no grant revenue in the three month periods ended June 30, 2023, and 2022.

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 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.

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; in such cases the long-term amount will be assessed for materiality. 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 monitors costs to meet its obligations on its customer contracts. When it is evident that there is a loss expected on a contract, a contract loss is accrued in the period. Several long-term contracts that were acquired from Neeltran, Inc. (“Neeltran”) were impacted by higher than planned costs due to required design changes and inflation on material costs, resulting in an increase to the contract loss accrual of $0.1 million and $0.2 million in the three month periods ended June 30, 2023 and 2022, respectively, which negatively impacted the Company's gross margins.

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 June 30, 2023*
Product Line:	*Grid*		*Wind*
Equipment and systems	$	23,126	$	3,982
Services and technology development		2,611		535
Total	$	25,737	$	4,517

Region:
Americas	$	23,161	$	-
Asia Pacific		1,711		4,465
EMEA		865		52
Total	$	25,737	$	4,517

	*Three Months Ended June 30, 2022*
Product Line:	*Grid*		*Wind*
Equipment and systems	$	18,076	$	1,973
Services and technology development		1,753		877
Total	$	19,829	$	2,850

Region:
Americas	$	16,902	$	-
Asia Pacific		2,677		2,850
EMEA		250		-
Total	$	19,829	$	2,850

As of June 30, 2023, and 2022, 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 7, “Accounts Receivable” and Note 8, “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, 2023	$	9,958		$	2,136		$	50,760
Increases for costs incurred to fulfill performance obligations		—			1,084			—
Increase (decrease) due to customer billings		(9,479	)		—			16,308
Decrease due to cost recognition on completed performance obligations		—			(1,234	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		5,092			—			(8,974	)
Other changes and FX impact		1			—			(11	)
Ending balance as of June 30, 2023	$	5,572		$	1,986		$	58,083

	Unbilled Accounts Receivable			Deferred Program Costs			Contract Liabilities
Beginning balance as of March 31, 2022	$	6,492		$	858		$	30,034
Increases for costs incurred to fulfill performance obligations		—			406			—
Increase (decrease) due to customer billings		(4,710	)		—			17,852
Decrease due to cost recognition on completed performance obligations		—			(365	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		2,128			—			(13,737	)
Other changes and FX impact		—			(25	)		(394	)
Ending balance as of June 30, 2022	$	3,910		$	874		$	33,755

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 June 30, 2023, the Company had outstanding performance obligations on existing contracts under ASC 606 to be recognized in the next twelve months of approximately $123.3 million. There are also approximately $41.5 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 months ended June 30, 2023 and 2022:

		*Three Months Ended*
	*Reportable*	*June 30,*
	*Segment*	*2023*			*2022*
Inox Wind Limited	Wind		12	%	<10%
SGL Carbon LLC	Grid	<10%				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 9
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-9

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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-10

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-Publisher FASB
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Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net loss	$ (5,398)	$ (8,710)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation and amortization	1,119	1,401
Stock-based compensation expense	1,357	1,033
Provision for excess and obsolete inventory	384	346
Deferred income taxes	(1)	61
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	1,350	170
Other non-cash items	168	(127)
Changes in operating asset and liability accounts:
Accounts receivable	549	(1,426)
Inventory	(6,272)	(9,633)
Prepaid expenses and other assets	6,901	580
Accounts payable and accrued expenses	(9,720)	6,343
Deferred revenue	7,318	4,099
Net cash used in operating activities	(2,245)	(5,863)
Cash flows from investing activities:
Purchase of property, plant and equipment	(214)	(441)
Change in other assets	(79)	(55)
Net cash used in investing activities	(293)	(496)
Cash flows from financing activities:
Repayment of debt	(17)	(20)
Net cash used in financing activities	(17)	(20)
Effect of exchange rate changes on cash	2	(17)
Net decrease in cash, cash equivalents and restricted cash	(2,553)	(6,396)
Cash, cash equivalents and restricted cash at beginning of period	25,675	49,486
Cash, cash equivalents and restricted cash at end of period	23,122	43,090
Supplemental schedule of cash flow information:
Cash paid for income taxes, net of refunds	81	49
Non-cash investing and financing activities
Issuance of common stock to settle liabilities	$ 163	$ 138

Note 5 - Goodwill and Other Intangibles - Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Accumulated Amortization	$ (13,678)	$ (13,134)
Net Book Value	6,183
Intangible assets, gross amount	21,661	21,661
Intangible assets, net	7,983	8,527
Trade Names [Member]
Trade name and trademarks	1,800	1,800
Licensing Agreements [Member]
Gross Amount	3,610	3,610
Accumulated Amortization	(3,610)	(3,610)
Net Book Value	0	$ 0
Estimated Useful Life (Year)		7 years
Backlog [Member]
Gross Amount	681	$ 681
Accumulated Amortization	(681)	(675)
Net Book Value	0	$ 6
Estimated Useful Life (Year)		2 years
Customer Relationships [Member]
Gross Amount	9,600	$ 9,600
Accumulated Amortization	(5,397)	(4,980)
Net Book Value	4,203	$ 4,620
Estimated Useful Life (Year)		7 years
Core Technology and Know-how [Member]
Gross Amount	5,970	$ 5,970
Accumulated Amortization	(3,990)	(3,869)
Net Book Value	$ 1,980	$ 2,101
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 12 - Income Taxes

3 Months Ended

Jun. 30, 2023

Income Tax Disclosure [Text Block]

12. Income Taxes

The Company recorded income tax expense of $0.1 million and less than $0.1 million in the three months ended June 30, 2023 and 2022, respectively.

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 three months ended June 30, 2023 and did not have any gross unrecognized tax benefits as of June 30, 2023.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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Note 18 - Business Segments - Total Business Segments Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Total assets	$ 170,634	$ 175,561
Operating Segments [Member] \| Grid [Member]
Total assets	136,941	135,296
Operating Segments [Member] \| Wind [Member]
Total assets	10,374	14,361
Corporate, Non-Segment [Member]
Total assets	$ 23,319	$ 25,904

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(5))
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-URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B

Reference 23: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481404/852-10-50-7

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
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Reference 25: http://www.xbrl.org/2003/role/disclosureRef
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Reference 26: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Note 6 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Fair value (millions)	$ 2,600	$ 1,300	$ 900	$ 1,100	$ 1,400	$ 1,200
Fair Value, Recurring [Member] \| Reported Value Measurement [Member]
Cash equivalents	7,658	7,913
Fair value (millions)	2,620	1,270
Fair Value, Recurring [Member] \| Reported Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash equivalents	7,658	7,913
Fair value (millions)	0	0
Fair Value, Recurring [Member] \| Reported Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Cash equivalents	0	0
Fair value (millions)	0	0
Fair Value, Recurring [Member] \| Reported Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Cash equivalents	0	0
Fair value (millions)	$ 2,620	$ 1,270

Note 16 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Restricted Cash and Cash Equivalents, Noncurrent	$ 622	$ 582
Restricted Cash and Cash Equivalents, Current	$ 500	$ 1,700

Note 8 - Inventory - Summary of Net Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Raw materials	$ 19,141	$ 16,654
Work-in-process	17,294	15,200
Finished goods	4,453	2,996
Deferred program costs	1,986	2,136
Net inventory	$ 42,874	$ 36,986

Note 1 - Nature of the Business and Operations and Liquidity (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Mar. 31, 2023	Feb. 28, 2021
Retained Earnings (Accumulated Deficit)	$ (1,060,945)		$ (1,060,945)	$ (1,055,547)
Cash, Cash Equivalents, and Marketable Securities	22,000		22,000
Net Cash Provided by (Used in) Operating Activities	$ (2,245)	$ (5,863)
Restructuring and Related Cost, Number of Positions Eliminated, Period Percent	5.00%
Restructuring and Related Cost, Expected Cost	$ 1,000		1,000
Payments for Restructuring			700
Restructuring and Related Cost, Expected Annual Savings	$ 5,000		$ 5,000
Inox Wind Limited [Member]
Supply Commitment, Default, Letters of Credit to be Received					$ 250,000

Amount of accumulated undistributed earnings (deficit).

+ References + Details

Note 17 - Restructuring

3 Months Ended

Jun. 30, 2023

Restructuring and Related Activities Disclosure [Text Block]

17. Restructuring

The Company accounts for charges resulting from operational restructuring actions in accordance with ASC Topic 420, Exit or Disposal Cost Obligations (“ASC 420”) and ASC Topic 712, Compensation—Nonretirement Postemployment Benefits (“ASC 712”). In accounting for these obligations, the Company is required to make assumptions related to the amounts of employee severance, benefits, and related costs and the time period over which leased facilities will remain vacant, sublease terms, sublease rates and discount rates. Estimates and assumptions are based on the best information available at the time the obligation arises. These estimates are reviewed and revised as facts and circumstances dictate; changes in these estimates could have a material effect on the amount accrued on the consolidated balance sheet.

On January 24, 2023, the Company approved a plan to reduce its global workforce by approximately 5%, effective as of such date. The purpose of the workforce reduction was to reduce operating expenses to better align with the Company’s current revenues. In fiscal 2022, the Company recorded restructuring charges of $1.0 million as a result of this reduction in force, which was comprised of severance pay. All amounts related to these restructuring activities are expected to be paid by March 31, 2024.

The following table presents restructuring charges and cash payments during the three months ended June 30, 2023 and year ended March 31, 2023 (in thousands):

	*Severance pay*
	*and benefits*
Accrued restructuring balance at April 1, 2023	$	717
Charges to operations		6
Cash payments		(327	)
Accrued restructuring balance at June 30, 2023	$	396

	*Severance pay*
	*and benefits*
Accrued restructuring balance at April 1, 2022	$	—
Charges to operations		1,048
Cash payments		(331	)
Accrued restructuring balance at March 31, 2023	$	717

All restructuring charges discussed above are included within restructuring in the Company’s condensed consolidated statements of operations. The Company includes accrued restructuring within accounts payable and accrued expenses in the consolidated balance sheets. The Company's restructuring charges relate primarily to the Grid business segment operations in the United States.

Note 6 - Fair Value Measurements

3 Months Ended

Jun. 30, 2023

Fair Value Disclosures [Text Block]

6. 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 months ended June 30, 2023.

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, are measured using such inputs as quoted prices and are classified within Level 1 of the valuation hierarchy. Cash equivalents consist principally of certificates of deposits and money market accounts.

Contingent Consideration

Contingent consideration relates to the earnout payment set forth in the Stock Purchase Agreement governing the acquisition of NEPSI that provides that the selling stockholders may receive up to an additional 1,000,000 shares of common stock of the Company upon the achievement of certain specified revenue objectives over varying periods of up to four years following the NEPSI Acquisition Date. See Note 13, "Contingent Consideration" for further discussion. The Company relied on a Monte Carlo method to determine the fair value of the contingent consideration on the closing of the acquisition of NEPSI and continues to revalue the fair value of the contingent consideration using the same method at each subsequent balance sheet date until the contingencies are resolved and the shares to be issued are determined, with the change in fair value recorded in the current period operating loss.

The following table provides the assets and liabilities carried at fair value on a recurring basis, measured as of June 30, 2023 and March 31, 2023 (in thousands):

	*Total Carrying Value*		*Quoted Prices in Active Markets (Level 1)*		*Significant Other Observable Inputs (Level 2)*		*Significant Unobservable Inputs (Level 3)*
June 30, 2023:
Assets:
Cash equivalents	$	7,658	$	7,658	$	—	$	—
Derivative liabilities:
Contingent consideration	$	2,620	$	—	$	—	$	2,620

	*Total Carrying Value*		*Quoted Prices in Active Markets (Level 1)*		*Significant Other Observable Inputs (Level 2)*		*Significant Unobservable Inputs (Level 3)*
March 31, 2023:
Assets:
Cash equivalents	$	7,913	$	7,913	$	—	$	—
Derivative liabilities:
Contingent consideration	$	1,270	$	—	$	—	$	1,270

The table below reflects the activity for the Company’s derivative liability measured at fair value on a recurring basis (in thousands):

	*Acquisition Contingent Consideration*
Balance at March 31, 2022	$	1,200
Change in fair value		70
Balance at March 31, 2023		1,270
Change in fair value		1,350
Balance at June 30, 2023	$	2,620

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.

+ References + Details

Unaudited Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Net loss	$ (5,398)	$ (8,710)
Other comprehensive (loss) gain, net of tax:
Foreign currency translation (loss) gain	(2)	63
Total other comprehensive (loss) gain, net of tax	(2)	63
Comprehensive loss	$ (5,400)	$ (8,647)

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

Note 2 - Revenue Recognition 1 (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Revenue, Performance Obligation Satisfied, Revenue Recognized, Percentage	76.00%	70.00%
Contract With Customer Loss Accrual	$ 100	$ 200
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
Grant [Member]
Revenues	$ 0	$ 0

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).

Note 18 - Business Segments - Operating Results for Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Revenues	$ 30,254	$ 22,679
Operating Income (loss)	(5,333)	(8,869)
Corporate, Non-Segment [Member]
Operating Income (loss)	(2,713)	(1,202)
Grid [Member]
Revenues	25,737	19,829
Grid [Member] \| Operating Segments [Member]
Operating Income (loss)	(1,971)	(7,281)
Wind [Member]
Revenues	4,517	2,850
Wind [Member] \| Operating Segments [Member]
Operating Income (loss)	$ (649)	$ (386)

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 924
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org//1943274/2147479806/606-10-50-4

Note 18 - Business Segments

3 Months Ended

Jun. 30, 2023

Segment Reporting Disclosure [Text Block]

18. Business Segments

The Company reports its financial results in two reportable business segments: Grid and Wind. In accordance with ASC 280, Segment Reporting, we aggregate four operating segments into one reporting segment for financial reporting purposes due to their similar operating and financial characteristics. Our 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.

The operating results for the two business segments are as follows (in thousands):

	*Three Months Ended June 30,*
	*2023*		*2022*
Revenues:
Grid	$	25,737	$	19,829
Wind		4,517		2,850
Total	$	30,254	$	22,679

	*Three Months Ended June 30,*
	*2023*			*2022*
Operating loss:
Grid	$	(1,971	)	$	(7,281	)
Wind		(649	)		(386	)
Unallocated corporate expenses		(2,713	)		(1,202	)
Total	$	(5,333	)	$	(8,869	)

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 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 loss.

Unallocated corporate expenses consist of a loss on contingent consideration of $1.3 million and $0.2 million in the three months ended June 30, 2023 and 2022, respectively. Additionally, unallocated corporate expenses consist of stock-based compensation expense of $1.4 million and $1.0 million in the three months ended June 30, 2023 and 2022, respectively.

Total assets for the two business segments as of June 30, 2023 and March 31, 2023, are as follows (in thousands):

	*June 30, 2023*		*March 31, 2023*
Grid	$	136,941	$	135,296
Wind		10,374		14,361
Corporate assets		23,319		25,904
Total	$	170,634	$	175,561

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Note 3 - Stock-based Compensation - Stock-based Compensation Expense by Financial Statement Line Item (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Total stock-based compensation expense	$ 1,357	$ 1,033
Cost of Sales [Member]
Total stock-based compensation expense	109	29
Research and Development Expense [Member]
Total stock-based compensation expense	156	179
Selling, General and Administrative Expenses [Member]
Total stock-based compensation expense	$ 1,092	$ 825

Note 17 - Restructuring (Tables)

3 Months Ended

Jun. 30, 2023

Restructuring and Related Costs [Table Text Block]

	*Severance pay*
	*and benefits*
Accrued restructuring balance at April 1, 2023	$	717
Charges to operations		6
Cash payments		(327	)
Accrued restructuring balance at June 30, 2023	$	396

	*Severance pay*
	*and benefits*
Accrued restructuring balance at April 1, 2022	$	—
Charges to operations		1,048
Cash payments		(331	)
Accrued restructuring balance at March 31, 2023	$	717

Note 18 - Business Segments (Tables)

3 Months Ended

Jun. 30, 2023

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

	*Three Months Ended June 30,*
	*2023*		*2022*
Revenues:
Grid	$	25,737	$	19,829
Wind		4,517		2,850
Total	$	30,254	$	22,679

	*Three Months Ended June 30,*
	*2023*			*2022*
Operating loss:
Grid	$	(1,971	)	$	(7,281	)
Wind		(649	)		(386	)
Unallocated corporate expenses		(2,713	)		(1,202	)
Total	$	(5,333	)	$	(8,869	)

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

	*June 30, 2023*		*March 31, 2023*
Grid	$	136,941	$	135,296
Wind		10,374		14,361
Corporate assets		23,319		25,904
Total	$	170,634	$	175,561

Note 5 - Goodwill and Other Intangibles (Tables)

3 Months Ended

Jun. 30, 2023

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

	*June 30, 2023*							*March 31, 2023*
	*Gross Amount*		*Accumulated Amortization*			*Net Book Value*		*Gross Amount*		*Accumulated Amortization*			*Net Book Value*		*Estimated Useful Life*
Licenses	$	3,610	$	(3,610	)	$	—	$	3,610	$	(3,610	)	$	—		7
Backlog		681		(681	)		—		681		(675	)	$	6		2
Trade name and trademarks		1,800		—			1,800		1,800		—			1,800		Indefinite
Customer relationships		9,600		(5,397	)		4,203		9,600		(4,980	)		4,620		7
Core technology and know-how		5,970		(3,990	)		1,980		5,970		(3,869	)		2,101		5-10
Intangible assets	$	21,661	$	(13,678	)	$	7,983	$	21,661	$	(13,134	)	$	8,527

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

Years ended March 31,	*Total*
2024		1,614
2025		1,648
2026		1,221
2027		1,085
2028		543
Thereafter		72
Total	$	6,183

Note 11 - Accounts Payable and Accrued Expenses (Details Textual)	3 Months Ended
	Jun. 30, 2023
Minimum [Member]
Extended Warranty Trigger Period (Year)	1 year
Maximum [Member]
Extended Warranty Trigger Period (Year)	3 years

Note 2 - Revenue Recognition (Tables)

3 Months Ended

Jun. 30, 2023

Disaggregation of Revenue [Table Text Block]

	*Three Months Ended June 30, 2023*
Product Line:	*Grid*		*Wind*
Equipment and systems	$	23,126	$	3,982
Services and technology development		2,611		535
Total	$	25,737	$	4,517

Region:
Americas	$	23,161	$	-
Asia Pacific		1,711		4,465
EMEA		865		52
Total	$	25,737	$	4,517

	*Three Months Ended June 30, 2022*
Product Line:	*Grid*		*Wind*
Equipment and systems	$	18,076	$	1,973
Services and technology development		1,753		877
Total	$	19,829	$	2,850

Region:
Americas	$	16,902	$	-
Asia Pacific		2,677		2,850
EMEA		250		-
Total	$	19,829	$	2,850

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, 2023	$	9,958		$	2,136		$	50,760
Increases for costs incurred to fulfill performance obligations		—			1,084			—
Increase (decrease) due to customer billings		(9,479	)		—			16,308
Decrease due to cost recognition on completed performance obligations		—			(1,234	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		5,092			—			(8,974	)
Other changes and FX impact		1			—			(11	)
Ending balance as of June 30, 2023	$	5,572		$	1,986		$	58,083

	Unbilled Accounts Receivable			Deferred Program Costs			Contract Liabilities
Beginning balance as of March 31, 2022	$	6,492		$	858		$	30,034
Increases for costs incurred to fulfill performance obligations		—			406			—
Increase (decrease) due to customer billings		(4,710	)		—			17,852
Decrease due to cost recognition on completed performance obligations		—			(365	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		2,128			—			(13,737	)
Other changes and FX impact		—			(25	)		(394	)
Ending balance as of June 30, 2022	$	3,910		$	874		$	33,755

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

		*Three Months Ended*
	*Reportable*	*June 30,*
	*Segment*	*2023*			*2022*
Inox Wind Limited	Wind		12	%	<10%
SGL Carbon LLC	Grid	<10%				10	%

Note 10 - Property, Plant and Equipment (Tables)

3 Months Ended

Jun. 30, 2023

Property, Plant and Equipment [Table Text Block]

	*June 30, 2023*			*March 31, 2023*
Land	$	980		$	980
Construction in progress - equipment		687			748
Buildings		5,416			5,416
Equipment and software		43,416			43,156
Finance lease - right of use asset		—			1
Furniture and fixtures		1,535			1,535
Leasehold improvements		6,815			6,815
Property, plant and equipment, gross		58,849			58,651
Less accumulated depreciation		(46,902	)		(46,342	)
Property, plant and equipment, net	$	11,947		$	12,309

Note 17 - Restructuring (Details Textual) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Jan. 24, 2023	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023
Restructuring and Related Cost, Workforce To be Reduced Percentage	5.00%
Restructuring Charges		$ 6	$ 0
Employee Severance [Member]
Restructuring Charges	$ 1,000	$ 6		$ 1,048

Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Current assets:
Cash and cash equivalents	$ 22,005	$ 23,360
Accounts receivable, net	30,116	30,665
Inventory, net	42,874	36,986
Prepaid expenses and other current assets	6,703	13,429
Restricted cash	496	1,733
Total current assets	102,194	106,173
Property, plant and equipment, net	11,947	12,309
Intangibles, net	7,983	8,527
Right-of-use assets	2,694	2,857
Goodwill	43,471	43,471
Restricted cash	622	582
Deferred tax assets	1,115	1,114
Other assets	608	528
Total assets	170,634	175,561
Current liabilities:
Accounts payable and accrued expenses	28,828	38,383
Lease liability, current portion	781	808
Debt, current portion	64	75
Contingent consideration	2,620	1,270
Deferred revenue, current portion	50,856	43,572
Total current liabilities	83,149	84,108
Deferred revenue, long-term portion	7,227	7,188
Lease liability, long-term portion	2,047	2,184
Deferred tax liabilities	259	243
Debt, long-term portion	9	15
Other liabilities	25	26
Total liabilities	92,716	93,764
Stockholders' equity:
Common stock	307	299
Additional paid-in capital	1,140,626	1,139,113
Treasury stock	(3,639)	(3,639)
Accumulated other comprehensive income	1,569	1,571
Accumulated deficit	(1,060,945)	(1,055,547)
Total stockholders' equity	77,918	81,797
Total liabilities and stockholders' equity	$ 170,634	$ 175,561

Note 7 - Accounts Receivable

3 Months Ended

Jun. 30, 2023

Accounts Receivable [Text Block]

7. Accounts Receivable

Accounts receivable at June 30, 2023 and March 31, 2023 consisted of the following (in thousands):

	*June 30, 2023*		*March 31, 2023*
Accounts receivable (billed)	$	24,544	$	20,707
Accounts receivable (unbilled)		5,572		9,958
Accounts receivable, net	$	30,116	$	30,665

Note 5 - Goodwill and Other Intangibles (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Goodwill, Impairment Loss	$ 0
Customer Relationship, Core Technology and Know-how [Member]
Amortization of Intangible Assets	500	$ 700
Backlog [Member]
Amortization of Intangible Assets	$ 100	$ 100

Note 7 - Accounts Receivable - Summary of Accounts Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Accounts receivable (billed)	$ 24,544	$ 20,707
Accounts receivable (unbilled)	5,572	9,958
Accounts receivable, net	$ 30,116	$ 30,665

Note 12 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Income Tax Expense (Benefit)	$ 121	$ 32
Liability for Uncertainty in Income Taxes, Current	0
Unrecognized Tax Benefits	$ 0
Maximum [Member]
Income Tax Expense (Benefit)		$ 100

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

+ References + Details

Note 14 - Debt

3 Months Ended

Jun. 30, 2023

Debt Disclosure [Text Block]

14. Debt

As part of the acquisition of Neeltran, the Company identified four equipment financing agreements that Neeltran had entered into prior to the acquisition of Neeltran on May 6, 2021. The current and long-term aggregate debt balance is $0.1 million as of June 30, 2023 and March 31, 2023, respectively.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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Note 10 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Property, plant and equipment, gross	$ 58,849	$ 58,651
Less accumulated depreciation	(46,902)	(46,342)
Property, plant and equipment, net	11,947	12,309
Land [Member]
Property, plant and equipment, gross	980	980
Construction in Progress [Member]
Property, plant and equipment, gross	687	748
Building [Member]
Property, plant and equipment, gross	5,416	5,416
Equipment and Software [Member]
Property, plant and equipment, gross	43,416	43,156
Finance Lease, Right-of-use [Member]
Property, plant and equipment, gross	0	1
Furniture and Fixtures [Member]
Property, plant and equipment, gross	1,535	1,535
Leasehold Improvements [Member]
Property, plant and equipment, gross	$ 6,815	$ 6,815

Note 2 - Revenue Recognition - Revenues by Major Customers (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Inox Wind Limited [Member] \| Wind [Member]
Inox Wind Limited	12.00%
SGL Carbon LLC [Member] \| Grid [Member]
Inox Wind Limited		10.00%

Note 18 - Business Segments (Details Textual) $ in Thousands	3 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)
Number of Reportable Segments	2
Number of Operating Segments	4
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 1,350	$ 170
Share-Based Payment Arrangement, Expense	$ 1,357	$ 1,033

Note 3 - Stock-based Compensation (Tables)

3 Months Ended

Jun. 30, 2023

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

	*Three Months Ended June 30,*
	*2023*		*2022*
Cost of revenues	$	109	$	29
Research and development		156		179
Selling, general and administrative		1,092		825
Total	$	1,357	$	1,033

Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]

Expected volatility		71.40	%
Risk-free interest rate		3.10	%
Expected life (years)		6.14
Dividend yield	None

Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Revenues	$ 30,254	$ 22,679
Grid [Member]
Revenues	25,737	19,829
Grid [Member] \| Americas [Member]
Revenues	23,161	16,902
Grid [Member] \| Asia Pacific [Member]
Revenues	1,711	2,677
Grid [Member] \| EMEA [Member]
Revenues	865	250
Wind [Member]
Revenues	4,517	2,850
Wind [Member] \| Americas [Member]
Revenues	0	0
Wind [Member] \| Asia Pacific [Member]
Revenues	4,465	2,850
Wind [Member] \| EMEA [Member]
Revenues	52	0
Equipment and Systems [Member] \| Grid [Member]
Revenues	23,126	18,076
Equipment and Systems [Member] \| Wind [Member]
Revenues	3,982	1,973
Services and Technology Development [Member] \| Grid [Member]
Revenues	2,611	1,753
Services and Technology Development [Member] \| Wind [Member]
Revenues	$ 535	$ 877

Note 9 - Prepaid and Other Current Assets

3 Months Ended

Jun. 30, 2023

Prepaid and Other Current Assets [Text Block]

9. Prepaid and Other Current Assets

During fiscal 2022, the Company conducted an analysis as to whether it was entitled to employee retention credits (“ERC”) under the CARES Act as amended by the Taxpayer Certainty and Disaster Tax Relief Act of 2020 and the American Plan Act of 2021. Based on the analysis, the Company determined that it was entitled to an ERC of approximately $3.3 million related to payroll taxes paid in the first and second quarters of 2021 and the first quarter of 2020. The Company determined it met all the criteria required under the gross receipts test of the applicable Internal Revenue Service regulations related to ERCs.

As accounting for payroll tax credits are not within the scope of ASC 740, Income Taxes, the Company has chosen to account for the ERCs by analogizing to the International Accounting Standards Board IAS 20, Accounting for Government Grants and Disclosure of Government Assistance. In accordance with IAS 20, an entity recognizes government grants only when there is reasonable assurance that the entity will comply with the conditions attached to them and the grants will be received. The Company evaluated its eligibility for the ERC and determined that it met all the criteria to claim a refundable tax credit against the employer portion of Social Security taxes for up to 70% of the qualified wages the Company paid to employees for the three month periods ended March 31, 2021 and June 30, 2021 and for up to 50% of the qualified wages the Company paid to employees for the three month period ended March 31, 2020.

The Company recorded a $3.3 million receivable in Prepaid expenses and other current assets and a benefit of $1.8 million to Cost of revenues, $0.8 million to SG&A and $0.7 million to Research and development in the fiscal year ended March 31, 2023 for the ERC that is expected to be received based on the amended filings. During the three months ended June 30, 2023, the Company received $2.2 million for the initial claims that were processed. The remaining balance is expected to be received during fiscal 2023.

Note 2 - Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Unbilled AR, beginning balance	$ 9,958	$ 6,492
Deferred Program Costs, beginning balance	2,136	858
Contract Liabilities, beginning balance	50,760	30,034
Deferred Program Costs, increases for costs incurred to fulfill performance obligations	1,084	406
Unbilled AR, increase (decrease) due to customer billings	(9,479)	(4,710)
Increase (decrease) due to customer billings	16,308	17,852
Deferred Program Costs, decrease due to cost recognition on completed performance obligations	(1,234)	(365)
Unbilled AR, increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	5,092	2,128
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	(8,974)	(13,737)
Unbilled AR, other changes and FX impact	1	0
Deferred Program Costs, other changes and FX impact	0	(25)
Other changes and FX impact	(11)	(394)
Unbilled AR, ending balance	5,572	3,910
Deferred Program Costs, ending balance	1,986	874
Contract Liabilities, ending balance	$ 58,083	$ 33,755

Note 13 - Contingent Consideration (Tables)

3 Months Ended

Jun. 30, 2023

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

	*June 30,*
Fiscal Year 2023	*2023*
Revenue risk premium		5.20	%
Revenue volatility		23	%
Stock Price	$	6.26
Payment delay (days)		80
Fair value (millions)	$	2.6

	*March 31,*			*December 31,*			*September 30,*			*June 30,*			*March 31,*
Fiscal Year 2022	*2023*			*2022*			*2022*			*2022*			*2022*
Revenue risk premium		5.30	%		5.30	%		5.20	%		6.60	%		6.50	%
Revenue volatility		25	%		25	%		25	%		30	%		33	%
Stock Price	$	4.91		$	3.68		$	4.38		$	5.18		$	7.61
Payment delay (days)		80			80			80			80			80
Fair value (millions)	$	1.3		$	0.9		$	1.1		$	1.4		$	1.2

Note 3 - Stock-based Compensation

3 Months Ended

Jun. 30, 2023

Share-Based Payment Arrangement [Text Block]

3. 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 months ended June 30, 2023 and 2022 (in thousands):

	*Three Months Ended June 30,*
	*2023*		*2022*
Cost of revenues	$	109	$	29
Research and development		156		179
Selling, general and administrative		1,092		825
Total	$	1,357	$	1,033

The Company issued 672,500 shares of restricted stock and 53,675 shares of immediately vested common stock during the three months ended June 30, 2023. The Company issued 25,806 shares of immediately vested common stock during the three months ended June 30, 2022. 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 estimated fair value of the Company’s stock-based awards, less expected annual forfeitures, is amortized over the awards’ service period. The total unrecognized compensation cost for unvested stock options was less than $0.1 million at June 30, 2023. This expense will be recognized over a weighted average of approximately 0.9 years. The total unrecognized compensation cost for unvested outstanding restricted stock was $7.7 million at June 30, 2023. This expense will be recognized over a weighted-average expense period of approximately 2.2 years.

The Company granted no stock options during the three months ended June 30, 2023. The Company granted 20,564 stock options during the three months ended June 30, 2022. The stock options granted during the three months ended June 30, 2022, will vest over 2 years. The weighted average assumptions used in the Black Scholes valuation model for stock options granted during the three months ended June 30, 2022 are as follows:

Expected volatility		71.40	%
Risk-free interest rate		3.10	%
Expected life (years)		6.14
Dividend yield	None

Note 15 - Leases

3 Months Ended

Jun. 30, 2023

Lessee, Operating Leases [Text Block]

15. Leases

The Company determines whether a contract is or contains a lease at inception of a contract. The Company defines a lease as a contract, or part of a contract, that conveys the right to control the use of identified property or equipment (an identified asset) for a period of time in exchange for consideration. Control over the use of the identified asset means that the Company has both the right to obtain substantially all of the economic benefits from the use of the asset and the right to direct the use of the asset.

The discount rate was calculated using an incremental borrowing rate based on an assessment prepared by the Company through the use of Company credit ratings, consideration of its lease populations potential risk to its total capital structure, and a market rate for a collateralized loan for its risk profile, calculated by a third party.

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 sheet.

Finance Leases

As of June 30, 2023, the right-of-use asset related to the finance lease, net of accumulated amortization is $13.2 thousand, and is included in the property and equipment, net on the Company's condensed consolidated balance sheet.

Finance lease right-of-use assets and lease liabilities are recognized similar to an operating lease, at the lease commencement date or the date the lessor makes the leased asset available for use. Finance lease right-of-use assets are generally amortized on a straight-line basis over the lease term, and the carrying amount of the finance lease liabilities are (1) accreted to reflect interest using the incremental borrowing rate if the rate implicit in the lease is not readily determinable, and (2) reduced to reflect lease payments made during the period. Amortization expense for finance lease right-of-use assets and interest accretion on finance lease liabilities are recorded to depreciation expense and interest expense, respectively in the Company's condensed consolidated statement of operations.

Supplemental balance sheet information related to leases at June 30, 2023, and March 31, 2023 are as follows (in thousands):

	*June 30, 2023*			*March 31, 2023*
Leases:
Right-of-use assets - Financing	$	-			1
Right-of-use assets - Operating		2,694			2,857
Total right-of-use assets		2,694			2,858

Lease liabilities - ST Financing	$	-			1
Lease liabilities - ST Operating		781			807
Lease liabilities - LT Operating		2,047			2,184
Total lease liabilities	$	2,828			2,992

Weighted-average remaining lease term		3.79 years			3.95 years
Weighted-average discount rate		6.67	%		6.46	%

The costs related to the Company's finance lease are not material. The costs related to the Company's operating leases for the three months ended June 30, 2023 and 2022 are as follows (in thousands):

	*Three Months Ended*
	*June 30, 2023*
Operating Leases:
Operating lease costs - fixed	$	259
Operating lease costs - variable		40
Short-term lease costs		37
Total lease costs	$	336

	*Three Months Ended*
	*June 30, 2022*
Operating Leases:
Operating lease costs - fixed	$	242
Operating lease costs - variable		38
Short-term lease costs		31
Total lease costs	$	311

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

	*Leases*
Year ended March 31,
2024	$	519
2025		793
2026		732
2027		592
2028		369
Thereafter		3
Total minimum lease payments		3,008
Less: interest		180
Present value of lease liabilities	$	2,828

Note 11 - Accounts Payable and Accrued Expenses (Tables)

3 Months Ended

Jun. 30, 2023

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

	*June 30, 2023*		*March 31, 2023*
Accounts payable	$	10,878	$	13,935
Accrued inventories in-transit		2,023		2,267
Accrued other miscellaneous expenses		3,646		3,870
Accrued contract loss		3,530		3,464
Advanced deposits		1,730		5,653
Accrued compensation		4,443		5,430
Income taxes payable		256		409
Accrued product warranty		1,926		2,638
Accrued restructuring		396		717
Total	$	28,828	$	38,383

Schedule of Product Warranty Liability [Table Text Block]

	*Three Months Ended June 30,*
	*2023*			*2022*
Balance at beginning of period	$	2,638		$	2,066
Provisions for warranties during the period		208			178
Settlements during the period		(920	)		(302	)
Balance at end of period	$	1,926		$	1,942

Note 11 - Accounts Payable and Accrued Expenses - Product Warranty Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Balance at beginning of period	$ 2,638	$ 2,066
Provisions for warranties during the period	208	178
Settlements during the period	(920)	(302)
Balance at end of period	$ 1,926	$ 1,942

Note 13 - Contingent Consideration

3 Months Ended

Jun. 30, 2023

Business Combination, Contingent Consideration [Text Block]

13. Contingent Consideration

Acquisition of NEPSI

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 unit. 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 may 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.

Contingent Consideration

The Company evaluated the NEPSI Acquisition earnout payment set forth in the NEPSI Stock Purchase Agreement, which may 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 each period, the fair value of the contingent consideration will be remeasured and the resulting gain or loss will be recognized in operating expenses until the share amount is fixed.

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,*
Fiscal Year 2023	*2023*
Revenue risk premium		5.20	%
Revenue volatility		23	%
Stock Price	$	6.26
Payment delay (days)		80
Fair value (millions)	$	2.6

	*March 31,*			*December 31,*			*September 30,*			*June 30,*			*March 31,*
Fiscal Year 2022	*2023*			*2022*			*2022*			*2022*			*2022*
Revenue risk premium		5.30	%		5.30	%		5.20	%		6.60	%		6.50	%
Revenue volatility		25	%		25	%		25	%		30	%		33	%
Stock Price	$	4.91		$	3.68		$	4.38		$	5.18		$	7.61
Payment delay (days)		80			80			80			80			80
Fair value (millions)	$	1.3		$	0.9		$	1.1		$	1.4		$	1.2

The Company recorded net losses of $1.3 million and $0.2 million resulting from the increases in the fair value of the contingent consideration in the three months ended June 30, 2023 and 2022, respectively.

Note 20 - Subsequent Events

3 Months Ended

Jun. 30, 2023

Subsequent Events [Text Block]

20. 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.

Unaudited Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ 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, 2022	28,920
Balance at Mar. 31, 2022	$ 289	$ 1,133,536	$ (3,639)	$ (291)	$ (1,020,506)	$ 109,389
Issuance of common stock - restricted shares (in shares)	9
Issuance of common stock - restricted shares	$ 0	0	0	0	0	0
Stock-based compensation expense		1,033				1,033
Issuance of stock for 401(k) match (in shares)	28
Issuance of stock for 401(k) match		138				138
Cumulative translation adjustment				63		63
Net loss					(8,710)	(8,710)
Issuance of common stock - restricted shares, net of forfeited shares (in shares)	(9)
Balance (in shares) at Jun. 30, 2022	28,939
Balance at Jun. 30, 2022	$ 289	1,134,707	(3,639)	(228)	(1,029,216)	101,913
Balance (in shares) at Mar. 31, 2023	29,937
Balance at Mar. 31, 2023	$ 299	1,139,113	(3,639)	1,571	(1,055,547)	81,797
Issuance of common stock - restricted shares (in shares)	699
Issuance of common stock - restricted shares	$ 7	(7)	0	0	0	0
Stock-based compensation expense		1,357				1,357
Issuance of stock for 401(k) match (in shares)	33
Issuance of stock for 401(k) match		163				164
Cumulative translation adjustment				(2)		(2)
Net loss					(5,398)	(5,398)
Issuance of common stock - restricted shares, net of forfeited shares (in shares)	(699)
Balance (in shares) at Jun. 30, 2023	30,669
Balance at Jun. 30, 2023	$ 307	$ 1,140,626	$ (3,639)	$ 1,569	$ (1,060,945)	$ 77,918

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

Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

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Note 14 - Debt (Details Textual) $ in Thousands	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	May 06, 2021
Debt, Current	$ 64	$ 75
Equipment Financing Agreements Assumed In Business Acquisition [Member]
Debt, Current		$ 100
Neeltran Inc. [Member]
Business Combination, Number of Equipment Financing Agreement Assumed			4

Note 19 - Recent Accounting Pronouncements

3 Months Ended

Jun. 30, 2023

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

19. Recent Accounting Pronouncements

In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The amendments in ASU 2016-13 will provide more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. Following the release of ASU 2019-10 in November 2019, the effective date, as long as the Company remains a smaller reporting company, was annual reporting periods beginning after December 15, 2022. As of April 1, 2023, the Company has adopted ASU 2016-13 and noted no material impact on its condensed consolidated financial statements.

In October 2021, the FASB issued ASU 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers. The amendments in ASU 2021-08 will improve the accounting for acquired revenue contracts with customers in a business combination. Following the release of ASU 2021-08 in October 2021, the effective date was annual reporting periods beginning after December 15, 2022. As of April 1, 2023, the Company has adopted ASU 2021-08 and noted no material impact on its condensed 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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Note 15 - Leases - Minimum Future Lease Obligation (Details) $ in Thousands	Jun. 30, 2023 USD ($)
2024	$ 519
2025	793
2026	732
2027	592
2028	369
Thereafter	3
Total minimum lease payments	3,008
Less: interest	180
Lease Liability [Member]
Present value of lease liabilities	$ 2,828

Document And Entity Information - shares	3 Months Ended
Document And Entity Information - shares	Jun. 30, 2023	Aug. 04, 2023
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	Q1
Document Fiscal Year Focus	2023
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
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
Entity Address, City or Town	St. 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	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		30,285,098

Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Revenues	$ 30,254	$ 22,679
Cost of revenues	23,972	20,458
Gross margin	6,282	2,221
Operating expenses:
Research and development	1,853	2,678
Selling, general and administrative	7,868	7,562
Amortization of acquisition-related intangibles	538	680
Change in fair value of contingent consideration	1,350	170
Restructuring	6	0
Total operating expenses	11,615	11,090
Operating loss	(5,333)	(8,869)
Interest income, net	174	24
Other income (expense), net	(118)	167
Loss before income tax expense	(5,277)	(8,678)
Income tax expense	121	32
Net loss	$ (5,398)	$ (8,710)
Net loss per common share
Basic (in dollars per share)	$ (0.19)	$ (0.32)
Diluted (in dollars per share)	$ (0.19)	$ (0.32)
Weighted average number of common shares outstanding
Basic (in shares)	28,258	27,560
Diluted (in shares)	28,258	27,560

Note 8 - Inventory (Tables)

3 Months Ended

Jun. 30, 2023

Schedule of Inventory, Current [Table Text Block]

	*June 30, 2023*		*March 31, 2023*
Raw materials	$	19,141	$	16,654
Work-in-process		17,294		15,200
Finished goods		4,453		2,996
Deferred program costs		1,986		2,136
Net inventory	$	42,874	$	36,986

Note 17 - Restructuring - Restructuring Charges and Cash Payments (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended	12 Months Ended
	Jan. 24, 2023	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Mar. 31, 2023
Accrued restructuring balance		$ 717
Restructuring Charges		6	$ 0
Cash payments restructuring				$ (700)
Accrued restructuring balance		396		396	$ 717
Employee Severance [Member]
Accrued restructuring balance		717	$ 0		0
Restructuring Charges	$ 1,000	6			1,048
Cash payments restructuring		(327)			(331)
Accrued restructuring balance		$ 396		$ 396	$ 717

Note 4 - Computation of Net Loss Per Common Share (Details Textual) shares in Millions	3 Months Ended
	Jun. 30, 2023 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	1.1
Shares Tied to Derivative Liability [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	1.0
Share-Based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	0.1

Note 6 - Fair Value Measurements (Details Textual) - shares	Jun. 30, 2023	Oct. 01, 2020
Northeast Power Systems, Inc (NEPSI) [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High, Number of Shares (in shares)	1,000,000	1,000,000

Note 11 - Accounts Payable and Accrued Expenses

3 Months Ended

Jun. 30, 2023