Description of Stock Plans (Detail) - USD ($)
$ / shares in Units, $ in Thousands |
1 Months Ended |
3 Months Ended |
6 Months Ended |
|
Aug. 31, 2016 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Mar. 31, 2016 |
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
| Weighted average grant-date fair value ($ per share) |
|
$ 0.82
|
$ 2.53
|
$ 0.82
|
$ 2.53
|
|
| Total unrecognized stock base compensation expense |
|
$ 6,731
|
$ 10,668
|
$ 6,731
|
$ 10,668
|
|
| Unvested stock options, weighted average period |
|
|
|
2 years 3 months 22 days
|
2 years 4 months 13 days
|
|
| Allocated stock compensation expense |
|
$ 1,173
|
$ 1,503
|
$ 2,476
|
$ 3,123
|
|
| Maximum |
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
| Option plan, term |
|
|
|
10 years
|
|
|
| Stock Option Plan 2011 |
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
| Reserved for future issuance (in shares) |
|
20,000,000
|
|
20,000,000
|
|
|
| Available for issuance (in shares) |
|
11,379,298
|
|
11,379,298
|
|
11,886,707
|
| 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
|
|
|
| Equity Option |
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
| Grants (shares) |
|
|
|
1,037,000
|
1,216,900
|
|
| Forfeitures/cancellations (shares) |
|
|
|
860,954
|
|
|
| Restricted Stock |
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
| Awarded (in shares) |
331,363
|
|
|
331,363
|
|
|
| Vesting period |
|
|
|
1 year
|
|
|
| Restricted Stock | Minimum |
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
| Vesting period |
|
|
|
3 months
|
|
|
| Restricted Stock | Maximum |
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
| Vesting period |
|
|
|
2 years
|
|
|
| Appia Core | Employee Stock Option |
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
| Vesting period |
|
|
|
4 years
|
|
|
| Expiration period |
|
|
|
10 years
|
|
|