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Note 16 - Segment Information - Product Group Information (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Net sales $ 87,618 $ 77,785 $ 56,186 $ 55,720 $ 75,341 $ 67,179 $ 61,959 $ 65,929 $ 277,309 $ 270,408
Net sales, percent                 100.00% 100.00%
Work Footwear [Member]                    
Net sales                 $ 126,268 $ 123,021
Net sales, percent                 45.50% 45.50%
Western Footwear [Member]                    
Net sales                 $ 61,127 $ 52,976
Net sales, percent                 22.00% 19.60%
Duty and Commercial Military Footwear [Member]                    
Net sales                 $ 41,005 $ 42,583
Net sales, percent                 14.80% 15.70%
Outdoor Footwear [Member]                    
Net sales                 $ 21,074 $ 18,494
Net sales, percent                 7.60% 6.80%
Military Footwear [Member]                    
Net sales                 $ 18,878 $ 26,064
Net sales, percent                 6.80% 9.60%
Apparel [Member]                    
Net sales                 $ 3,382 $ 2,782
Net sales, percent                 1.20% 1.00%
Product and Service, Other [Member]                    
Net sales                 $ 5,575 $ 4,488
Net sales, percent                 2.00% 1.70%