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Note 20 - Related Party Transactions (Details Textual) - Majority Shareholder [Member] - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from Related Parties	$ 2,854,000	$ 585,000	$ 4,834,000
Related Party Transaction, Expenses from Transactions with Related Party	9,859,000	7,497,000	8,837,000
Due from Related Parties, Total	149,000	21,000
Due to Related Parties, Total	2,161,000	971,000
Freight Transportation [Member]
Accounts Receivable, Related Parties	147,000	19,000
Maintenance Performed and Charges Paid to Third Parties on Behalf of Their Affiliate and Charged Back [Member]
Accounts Receivable, Related Parties	2,000	2,000
Insurance Premiums Paid in Excess of Amounts Earned [Member]
Accounts Receivable, Related Parties	29,000	1,385,000
Physical Damage Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	1,271,000	1,808,000	2,091,000
Auto Liability Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	10,987,000	10,860,000	11,030,000
General Liability Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	24,000	35,000	21,000
Workers Compensation Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	$ 301,000	$ 286,000	$ 298,000

X

- Definition

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

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