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Note 12 - Income Taxes - Income Tax (Provision) for Federal Statutory Corporate Income Tax Rate (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Tax benefit (provision) at federal statutory rate | $ 2,152 | $ 5,403
State income tax benefit (provision), net of federal benefit | 413 | 439
Research and development tax credits | 250 | 411
Subpart F inclusion |  | (370)
Foreign earnings or losses taxed at different rates | 12 | (540)
Tax rate change | 23 | (3,161)
Other | 628 | 372
Change in valuation allowance | (9,918) | (833)
Tax benefit (provision) | $ (6,440) | $ 1,721

X
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