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Note 19 - Related Party Transactions (Details Textual) - Majority Shareholder [Member] - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Revenue from Related Parties $ 1,363,000 $ 8,085,000 $ 9,897,000
Related Party Transaction, Expenses from Transactions with Related Party 21,438,000 11,103,000 6,791,000
Due from Related Parties, Total 723,000 636,000  
Due to Related Parties, Total 1,290,000 1,276,000  
Freight Transportation [Member]      
Accounts Receivable, Related Parties 382,000 448,000  
Maintenance Performed and Charges Paid to Third Parties on Behalf of Their Affiliate and Charged Back [Member]      
Accounts Receivable, Related Parties 341,000 188,000  
Auto Liability Coverage [Member]      
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party 11,437,000 9,851,000 8,516,000
Workers Compensation Coverage [Member]      
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party $ 338,000 $ 300,000 $ 299,000