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Note 8 - Accrued Expenses - Accrued Expenses (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Sales commissions $ 2,528 $ 2,574
Subcontracting labor 1,622 758
Salaries, bonuses and related benefits 15,444 17,165
Warranty accrual 1,315 1,010
Other 8,267 6,969
Accrued Liabilities, Current, Total $ 29,176 $ 28,476