Quarterly report pursuant to Section 13 or 15(d)

Product Warranty Liability - Additional Information (Detail)

v3.10.0.1
Product Warranty Liability - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Guarantees [Abstract]        
Expense (income) for product warranties $ (37) $ 78 $ 11 $ (82)