Annual report pursuant to Section 13 and 15(d)

Accrued Warranty Reserve (Details)

v3.20.1
Accrued Warranty Reserve (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Accrued Warranty Reserve    
Maximum period of product warranties 24 years  
Accrued Warranty Reserve    
Standard Product Warranty Period Maximum 24 years  
Balance, beginning of the period $ 2,614 $ 1,682
Standard warranty provision 594 2,200
Deductions for warranty claims (1,274) (1,268)
Balance, end of the period $ 1,934 $ 2,614