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Note 19 - Related Party Transactions (Details Textual) - Majority Shareholder [Member] - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Revenue from Related Parties | $ 9,897,000 | $ 2,691,000 | $ 2,854,000
Related Party Transaction, Expenses from Transactions with Related Party | 6,791,000 | 9,190,000 | 9,859,000
Due from Related Parties, Total | 2,348,000 | 1,052,000 |
Due to Related Parties, Total | 1,864,000 | 961,000 |
Freight Transportation [Member] |  |  |
Accounts Receivable, Related Parties | 2,236,000 | 1,052,000 |
Maintenance Performed and Charges Paid to Third Parties on Behalf of Their Affiliate and Charged Back [Member] |  |  |
Accounts Receivable, Related Parties | 112,000 | 0 |
Physical Damage Coverage [Member] |  |  |
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party | 0 | 0 | 1,271,000
Auto Liability Coverage [Member] |  |  |
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party | 8,516,000 | 10,345,000 | 10,987,000
General Liability Coverage [Member] |  |  |
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party | 0 | 0 | 24,000
Workers Compensation Coverage [Member] |  |  |
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party | $ 299,000 | $ 266,000 | $ 301,000

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