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Stock-based compensation (Tables)
 6 Months Ended
Sep. 30, 2020
Share-based Payment Arrangement [Abstract]  
Summary of Stock Option Activity and Related Information
The following table summarizes the activity for options that vest solely based upon the satisfaction of a service condition for the six months ended September 30, 2020:
 Shares subject to options
outstanding		Weighted-average exercise priceWeighted-average remaining
contractual life
(in years)		Aggregate intrinsic
values
(in thousands)
Balance as of March 31, 20201,999,553 $13.17   
Exercised(136,769)3.32   
Canceled or forfeited(14,641)23.39   
Balance as of September 30, 20201,848,143 $13.82 6.4$8,961 
Exercisable, September 30, 20201,354,782 $13.52 5.8$6,992 
The following table summarizes the activity for stock options that vest based upon the satisfaction of performance- or market-based vesting conditions for the six months ended September 30, 2020:
 
Shares subject to options
outstanding
Weighted-average exercise priceWeighted-average remaining
contractual life
(in years)		Aggregate intrinsic
values
(in thousands)
Balance as of March 31, 20201,252,932 $7.97   
Exercised(27,600)1.84   
Balance as of September 30, 20201,225,332 $8.07 4.5$15,159 
Exercisable, September 30, 2020925,332 $1.99 3.9$15,159 
Summary of Activities for Restricted Stock Awards ("RSAs") and Restricted Stock Units ("RSUs")
The following table summarizes the activities for restricted stock awards (“RSAs”) and restricted stock units (“RSUs”) for the six months ended September 30, 2020:
 RSUs and shares of restricted stock outstandingWeighted-average grant date fair value
Balance as of March 31, 20202,311,768 $12.86 
Granted 1,108,344 16.98 
Vested(274,918)14.15 
Canceled or forfeited(150,819)14.32 
Balance as of September 30, 20202,994,375 $14.19