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Note 10 - Accounts Payable and Accrued Expenses - Product Warranty Activity (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Balance at beginning of period $ 2,015 $ 1,545
Change in accruals for warranties during the period 236 85
Settlements during the period (83) (24)
Balance at end of period $ 2,168 $ 1,606