Annual report pursuant to Section 13 and 15(d)

Description of Stock Plans - Intrinsic Value of Options Exercised and Fair Value of Options Vested (Detail)

v3.7.0.1
Description of Stock Plans - Intrinsic Value of Options Exercised and Fair Value of Options Vested (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Total fair value of options vested $ 3,519 $ 5,288 $ 3,155
Total intrinsic value of options exercised $ 10 $ 3 $ 71