Description of Stock Plans (Details) - USD ($)
$ / shares in Units, $ in Thousands |
3 Months Ended |
|
Jun. 30, 2018 |
Jun. 30, 2017 |
Mar. 31, 2018 |
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
| Weighted average grant-date fair value (in dollars per share) |
$ 1.68
|
$ 1.00
|
|
| Total unrecognized stock base compensation expense |
$ 2,747
|
$ 3,491
|
|
| Unvested stock options, weighted average period |
2 years 3 months 21 days
|
2 years 24 days
|
|
| Allocated stock compensation expense |
$ 548
|
$ 791
|
|
| Maximum |
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
| Option plan, term |
10 years
|
|
|
| Equity Option |
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
| Grants (shares) |
1,198,425
|
326,500
|
|
| Forfeitures/cancellations (shares) |
388,570
|
|
|
| Restricted Stock |
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
| Awarded (in shares) |
232,558
|
|
|
| Stock Option Plan 2011 |
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
| Reserved for future issuance (in shares) |
20,000,000
|
|
|
| Available for issuance (in shares) |
8,093,100
|
|
9,135,513
|
| Stock Incentive Plans | Minimum |
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
| Option plan, term |
3 years
|
|
|
| Stock Incentive Plans | Maximum |
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
| Option plan, term |
4 years
|
|
|