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Note 11 - Accounts Payable and Accrued Expenses - Product Warranty Activity (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Balance at beginning of period $ 1,641 $ 1,760 $ 1,545 $ 1,769
Change in accruals for warranties during the period 93 260 247 577
Settlements during the period (28) (524) (86) (850)
Balance at end of period $ 1,706 $ 1,496 $ 1,706 $ 1,496