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Note J - Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 20, 2021
Mar. 21, 2020
Gross Sales $ 65,480 $ 42,148
Returns 1,615 1,079
Warranties 582 405
Customer Allowances 4,092 3,375
Total Gross-to-Net Sales Adjustments 6,289 4,859
Total Net Sales 59,191 37,289
Mass Merchants [Member]    
Gross Sales 18,396 13,468
Specialty Dealers [Member]    
Gross Sales 22,560 13,067
E-commerce [Member]    
Gross Sales 21,226 13,581
International [Member]    
Gross Sales 2,727 1,556
Other Channels [Member]    
Gross Sales $ 571 $ 476