Note 12 - Income Taxes (Details) - Income Tax Expense (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$ 262us-gaap_CurrentFederalTaxExpenseBenefit	$ 227us-gaap_CurrentFederalTaxExpenseBenefit	$ 108us-gaap_CurrentFederalTaxExpenseBenefit
State	74	64	24
Total current	336us-gaap_CurrentIncomeTaxExpenseBenefit	291us-gaap_CurrentIncomeTaxExpenseBenefit	132us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	3,753	3,554	1,598
State	813	1,351	280
Total deferred	4,566us-gaap_DeferredIncomeTaxExpenseBenefit	4,905us-gaap_DeferredIncomeTaxExpenseBenefit	1,878us-gaap_DeferredIncomeTaxExpenseBenefit
Change in valuation allowance	0	(19,602)	(1,878)
Income tax expense (benefit)	$ 4,902us-gaap_IncomeTaxExpenseBenefit	$ (14,406)us-gaap_IncomeTaxExpenseBenefit	$ 132us-gaap_IncomeTaxExpenseBenefit

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