Note 8 - Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Reconciliation of income tax benefit to statutory rate:
Income benefit at statutory rate	$ (528)	$ (425)
State income taxes (benefit), net of federal income tax benefit	(40)	(28)
RTP (ISO expense)	38	116
Permanent differences	28	65
Change in valuation allowance	890	(316)
Change in state tax rate	(345)	577
Other	$ (43)	$ 11

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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