v3.7.0.1
Stockholders' Equity - Summary of Company's Restricted Stock Unit Activity (Detail) - Restricted stock units (RSUs) [Member]
3 Months Ended
Jun. 30, 2017
$ / shares
shares
Class Of Stock [Line Items]  
Beginning balance, Unvested, Number of Shares | shares 1,178,114
Granted, Number of Shares | shares 1,862,078
Vested, Number of Shares | shares (36,221)
Canceled / forfeited, Number of Shares | shares (80,857)
Ending balance, Unvested, Number of Shares | shares 2,923,114
Beginning balance, Unvested, Weighted Average Price | $ / shares $ 3.57
Granted, Weighted Average Price | $ / shares 2.66
Vested, Weighted Average Price | $ / shares 3.85
Canceled / forfeited, Weighted Average Price | $ / shares 3.21
Ending balance, Unvested, Weighted Average Price | $ / shares $ 3.00