Stockholders' Equity - Summary of Company's Restricted Stock Unit Activity (Detail) - Restricted stock units (RSUs) [Member] - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
Mar. 31, 2015 |
|
| Class Of Stock [Line Items] | |||
| Beginning balance, Unvested, Number of Shares | 0 | ||
| Granted, Number of Shares | 1,309,656 | ||
| Vested, Number of Shares | (106,650) | (250,000) | (255,000) |
| Canceled / forfeited, Number of Shares | (24,892) | ||
| Ending balance, Unvested, Number of Shares | 1,178,114 | 0 | |
| Beginning balance, Unvested, Weighted Average Price | $ 0 | ||
| Granted, Weighted Average Price | 3.59 | ||
| Vested, Weighted Average Price | 3.86 | ||
| Canceled / forfeited, Weighted Average Price | 3.21 | ||
| Ending balance, Unvested, Weighted Average Price | $ 3.57 | $ 0 | |