Description of Stock Plans - Intrinsic Value of Options Exercised and Fair Value of Options Vested (Detail) - USD ($) $ in Thousands |
6 Months Ended | |
|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||
| Total fair value of options vested | $ 2,452 | $ 2,847 |
| Total intrinsic value of options exercised | $ 8 | $ 110 |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|