Rendering

Component: (Network and Table)
Network
100750 - Disclosure - Stockholders' Equity - Schedule of Weighted Average Assumptions used in Black-Scholes Valuation Model for Stock Options Granted (Detail)
(http://www.amsc.com/20160331/taxonomy/role/DisclosureStockholdersEquityScheduleOfWeightedAverageAssumptionsUsedInBlackScholesValuationModelForStockOptionsGrantedDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000880807 (http://www.sec.gov/CIK)
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]Period [Axis]
2015-04-01 - 2016-03-31
2014-04-01 - 2015-03-31
2013-04-01 - 2014-03-31
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
 
 
 
Expected volatility
 
.855  
.751  
Risk-free interest rate
 
.019  
.017  
Expected life (years)
 
P5Y9M18D  
P5Y10M24D  
Dividend yield
0  
0  
0