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Note 10 - Accumulated Other Comprehensive Loss - Reclassification of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Cost of sales $ 94,545 $ 63,536
Net income 3,559 2,175
Net sales 109,331 72,311
Tax (expense) benefit (1,343) (602)
Reclassification out of Accumulated Other Comprehensive Income [Member]    
Net income 9 (31)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]    
Cost of sales (2) (4)
Net income (2) (4)
Tax (expense) benefit (3) 9
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]    
Net income 11 (27)
Net sales $ 14 $ (36)