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Note 10 - Income Taxes - Components of the Income Tax Provision (Benefit) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Current:      
Federal $ 12 $ 313
State 84 (38) 268
Components of the Income Tax Provision, Current Total 96 275 268
Deferred:      
Federal 983 789 (15,140)
State 127 294 122
Components of the Income Tax Provision, Deferred Total 1,111 1,083 (15,018)
Income tax expense (benefit) $ 1,207 $ 1,358 $ (14,750)