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Note 9 - Income Taxes (Details) - Provision for Income Taxes (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Provision for Income Taxes [Abstract]
Current tax expense	$ 3,637us-gaap_CurrentIncomeTaxExpenseBenefit	$ 2,795us-gaap_CurrentIncomeTaxExpenseBenefit	$ 2,968us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred tax (benefit) expense	(517)us-gaap_DeferredIncomeTaxExpenseBenefit	144us-gaap_DeferredIncomeTaxExpenseBenefit	(206)us-gaap_DeferredIncomeTaxExpenseBenefit
Total income taxes	$ 3,120us-gaap_IncomeTaxExpenseBenefit	$ 2,939us-gaap_IncomeTaxExpenseBenefit	$ 2,762us-gaap_IncomeTaxExpenseBenefit

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

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