Note 19 - Related Party Transactions (Details Textual) - Majority Shareholder [Member] - USD ($)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue from Related Parties	$ 8,085,000	$ 9,897,000	$ 2,691,000
Related Party Transaction, Expenses from Transactions with Related Party	11,103,000	6,791,000	9,190,000
Due from Related Parties, Total	636,000	2,348,000
Due to Related Parties, Total	1,276,000	1,864,000
Freight Transportation [Member]
Accounts Receivable, Related Parties	448,000	2,236,000
Maintenance Performed and Charges Paid to Third Parties on Behalf of Their Affiliate and Charged Back [Member]
Accounts Receivable, Related Parties	188,000	112,000
Auto Liability Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	9,851,000	8,516,000	10,345,000
Workers Compensation Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	$ 300,000	$ 299,000	$ 266,000

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

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