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Note K - Notes Payable (Details Textual) - Equipment Financing [Member]
$ in Millions
3 Months Ended
Mar. 31, 2022
USD ($)
Revenue Equipment [Member]  
Notes Payable, Total $ 48.7
Trailers [Member] | Minimum [Member]  
Notes Payable, Number of Monthly Installments 36
Trailers [Member] | Maximum [Member]  
Notes Payable, Number of Monthly Installments 120