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Note 18 - Related Party Transactions (Details Textual) - Majority Shareholder [Member] - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue from Related Parties	$ 585,000	$ 4,834,000	$ 11,325,000
Related Party Transaction, Expenses from Transactions with Related Party	7,497,000	8,837,000	4,834,000
Due from Related Parties	21,000	929,000
Due to Related Parties	971,000	1,297,000
Freight Transportation [Member]
Accounts Receivable, Related Parties	19,000	925,000
Maintenance Performed and Charges Paid to Third Parties on Behalf of Their Affiliate and Charged Back [Member]
Accounts Receivable, Related Parties	2,000	4,000
Insurance Premiums Paid in Excess of Amounts Earned [Member]
Accounts Receivable, Related Parties	1,385,000	472,000
Physical Damage Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	1,808,000	2,091,000	2,467,000
Auto Liability Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	10,860,000	11,030,000	9,605,000
General Liability Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	35,000	21,000	23,000
Workers Compensation Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	$ 286,000	$ 298,000	276,000
Trucks [Member]
Proceeds from Sale of Productive Assets			$ 67,500

X

- Definition

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

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