Note 13 - Accrued Liabilities - Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accrued payroll	$ 8,348	$ 10,517
Accrued employee benefits	3,247	3,057
Accrued state and local taxes	1,390	251
Accrued interest	351	1,256
Advance payments	480	303
Accrued product warranty	272	703
Accrued commission expenses	903	974
Accrued professional fees	293	377
Accrued shipping and tariff expenses	235	526
Accrued other	685	547
Total accrued liabilities	$ 16,204	$ 18,511