Quarterly report pursuant to Section 13 or 15(d)

Product Warranty Liability - Reconciliation of the Changes in Product Warranty Liability (Detail)

v3.20.2
Product Warranty Liability - Reconciliation of the Changes in Product Warranty Liability (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Guarantees [Abstract]        
Balance at beginning of period $ 305 $ 358 $ 359 $ 366
(Income) expense for product warranties 14 1 (5) 28
Product warranty claims paid (11) (11) (46) (46)
Balance at end of period $ 308 $ 348 $ 308 $ 348