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Stock-based Compensation Assumptions Used In Black-Scholes Model (Details) - Option Grants - $ / shares
3 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Expected volatility 51.00% 53.00%
Expected dividend yield 0.00% 0.00%
Risk-free interest rate 1.40% 1.59%
Weighted average expected option term, in years 5 years 9 months 5 years 3 months
Weighted average fair value of options granted, per share $ 5.45 $ 4.17