v2.4.0.6
Document and Entity Information
3 Months Ended
Jun. 30, 2013
Aug. 01, 2013
Document Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2013  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q1  
Entity Registrant Name AMERICAN SUPERCONDUCTOR CORP /DE/  
Entity Central Index Key 0000880807  
Current Fiscal Year End Date --03-31  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   63,124,801