Note 10 - Federal and State Income Taxes (Details) - Significant Components Deferred Tax assets and Liabilities (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current deferred tax assets:
Accrued expenses not deductible until paid	$ 7,648	$ 3,885
Equity Incentive Plan	282	266
Revenue recognition	330	277
Allowance for doubtful accounts	234	162
Other	452	16
Total current deferred tax assets	8,946	4,606
Current deferred tax liabilities:
Prepaid expenses deductible when paid	(6,159)	(5,910)
Total current deferred tax liabilities	(6,159)	(5,910)
Net current deferred tax assets (liabilities)	2,787	(1,304)
Noncurrent deferred tax assets:
Non-compete agreement	18	41
Net operating loss carry forwards	6,052	16,452
Total noncurrent deferred tax assets	6,070	16,493
Noncurrent deferred tax liabilities:
Tax over book depreciation	(41,041)	(52,237)
Capitalized leases	(71)	(215)
Other	3	6
Total noncurrent deferred tax liabilities	(41,109)	(52,446)
Net noncurrent deferred tax liabilities	$ (35,039)	$ (35,953)