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Stock-Based Compensation - Fair Value Assumptions (Details) - Employee Stock Purchase Plan - $ / shares
9 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life (years) 6 months 6 months
Risk-free interest rate 0.10% 0.10%
Volatility 57.00% 57.00%
Weighted average fair value (in dollars per share) $ 1.80 $ 2.57