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Stock-based Compensation Option Activity (Details)
 9 Months Ended
Dec. 31, 2015
$ / shares
shares
Stock-based Compensation Option Activity Details  
Balance at beginning of period | shares 5,327,907
Granted | shares 686,604
Exercised | shares (647,158)
Cancelled/forfeited | shares (96,241)
Balance at end of period | shares 5,271,112
Options, Vested and expected to vest | shares 5,271,112
Options, Exercisable at end of period | shares 3,229,890
Weighted-average exercise price of options outstanding, at beginning of period | $ / shares $ 5.19
Weighted-average exercise price of options granted during period | $ / shares 8.51
Weighted-average exercise price of options exercised during the period | $ / shares 2.54
Weighted-average exercise price of options forfeited, cancelled or expired during the period | $ / shares 8.06
Weighted-average exercise price of options outstanding at end of period | $ / shares 5.90
Options, Vested and Expected to Vest, Weighted Average Exercise Price | $ / shares 5.90
Weighted-Average Exercise Prices, Exercisable at end of period | $ / shares $ 4.38