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Note 7 - Income Taxes - Income Tax Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Reconciliation of income tax benefit to statutory rate:    
Income benefit at statutory rate $ 480 $ (10)
State income taxes (benefit), net of federal income tax benefit 57 1
RTP (ISO expense) 3
Permanent differences (91) 11
Change in valuation allowance (450) (11,478)
Remeasurment of Deferreds 11,476
Other $ 1