Rendering

Component: (Network and Table)
Network
00090 - Document - Document And Entity Information
(http://www.amsc.com/role/DocumentDocumentAndEntityInformation)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Document And Entity Information [Abstract]Period [Axis]
2011-04-01 - 2012-03-31
2012-05-29
2011-09-30
Document And Entity Information [Abstract]
 
 
 
Document Type
10-K 
 
 
Amendment Flag
false 
 
 
Document Period End Date
2012-03-31 
 
 
Document Fiscal Year Focus
2012 
 
 
Document Fiscal Period Focus
FY 
 
 
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
 
51,994,311  
 
Entity Well-known Seasoned Issuer
No 
 
 
Entity Current Reporting Status
Yes 
 
 
Entity Voluntary Filers
No 
 
 
Entity Public Float
 
 
149,200,000