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Note 9 - Income Taxes (Details) - Components of Income Tax Expense (Benefit) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components of Income Tax Expense (Benefit) [Abstract]
Federal, current	$ (94)us-gaap_CurrentFederalTaxExpenseBenefit	$ (816)us-gaap_CurrentFederalTaxExpenseBenefit	$ (707)us-gaap_CurrentFederalTaxExpenseBenefit
Federal, deferred	12,830	7,560	6,897
State, current	187	102	307
State, deferred	1,851	657	(162)
	$ 14,774us-gaap_IncomeTaxExpenseBenefit	$ 7,503us-gaap_IncomeTaxExpenseBenefit	$ 6,335us-gaap_IncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.