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Note 14 - Income Tax - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Computed "expected" income tax benefit, amount | $ (1,531) | $ (1,161)
Computed "expected" income tax benefit, percent | 21.00% | 21.00%
Permanent differences, net, amount | $ 141 | $ 241
Permanent differences, net, percent | (1.90%) | (4.40%)
Foreign tax rate differential, amount | $ (14) | $ 42
Foreign tax rate differential, percent | 0.20% | (0.80%)
State income taxes, net of federal income tax benefit, amount | $ (77) | $ (74)
State income taxes, net of federal income tax benefit, percent | 1.10% | 1.30%
Non-deductible stock compensation expense, amount | $ 94 | $ 205
Non-deductible stock compensation expense, percent | (1.30%) | (3.70%)
Tax credits, amount | $ (192) | $ (220)
Tax credits, percent | 2.60% | (4.00%)
Tax credits, amount | $ 192 | $ 220
Change in reserve for uncertain tax position, amount | $ 259 | $ (111)
Change in reserve for uncertain tax position, percent | (3.60%) | 2.00%
Impact of change to prior year tax accruals, amount | $ 168 | $ 314
Impact of change to prior year tax accruals, percent | (2.30%) | (5.70%)
Change in valuation allowance allocated to income tax, amount | $ 2,130 | $ (578)
Change in valuation allowance allocated to income tax, percent | (29.20%) | 10.50%
Other, amount | $ (460) | $ 87
Other, percent | 6.30% | (1.40%)
Total income tax expense (benefit), amount | $ 518 | $ (815)
Total income tax expense (benefit), percent | (7.10%) | 14.80%

X
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