Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment - Additional Information (Detail)

v3.21.1
Property, Plant and Equipment - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Property Plant And Equipment [Abstract]      
Depreciation expense $ 1,945 $ 1,957 $ 1,968