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Shareholders' Equity (Details)
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Shareholders Equity Details    
Risk-free interest rate 1.60%  
Risk-free interest rate, minimum (as a percent)   1.40%
Risk-free interest rate, maximum (as a percent)   1.70%
Expected life 5 years 5 years
Expected volatility, minimum (as a percent) 72.00% 74.00%
Expected volatility, maximum (as a percent) 75.00% 75.00%
Expected dividend (as a percent) 0.00% 0.00%