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Note 1- Accounting Policies (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Bank Overdrafts $ 135,000 $ 43,000  
Other Receivables, Net, Current, Total 6,263,000 7,092,000  
Advertising Expense $ 2,101,000 $ 1,154,000 $ 1,102,000
Truckload Services [Member] | Sales [Member] | Product Concentration Risk [Member]      
Concentration Risk, Percentage 66.00% 67.00% 76.90%
Independent Contractors [Member]      
Other Receivables, Net, Current, Total $ 1,379,000 $ 1,037,000