XML 60 R49.htm IDEA: XBRL DOCUMENT v3.8.0.1
Inventory - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]        
Provision for excess and obsolete inventory $ 100 $ 400 $ 415 $ 1,074