Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Earnings Per Share [Abstract] | ||||
| Net loss | $ (7,341) | $ (8,322) | $ (14,753) | $ (16,441) |
| Weighted-average shares used to compute basic and diluted net loss per share (in shares) | 66,457 | 57,274 | 66,358 | 57,328 |
| Basic and diluted net loss per share ($ per share) | $ (0.11) | $ (0.14) | $ (0.22) | $ (0.29) |
| Common stock equivalents excluded from net loss per diluted share because their effect would have been anti-dilutive (in shares) | 156 | 559 | 81 | 836 |