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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

X

- Definition

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

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