Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail)

v3.7.0.1
Income Taxes - Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Balance at April 1 $ 783 $ 905 $ 61
Additions for tax position of prior years 158 0 844
Reductions for tax positions of prior years 0 (122) 0
Balance at March 31 $ 941 $ 783 $ 905