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Note 2 - Details of Consolidated Balance Sheet Accounts - Prepaid Expenses and Other (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Insurance premiums	$ 3,057	$ 1,658
Other	2,786	2,906
	19,810	19,307
License Fees Member [Member]
Prepaid expenses	4,858	5,042
Tires In Service [Member]
Prepaid expenses	4,787	5,351
Parts And Tires Inventory [Member]
Prepaid expenses	$ 4,322	$ 4,350

X

- Definition

Amount of current assets classified as other.

+ References

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-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
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