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Note 5 - Income Taxes - Income Taxes Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Provision for income taxes at federal statutory rate | $ 1,976 | $ 638
Provision for income taxes at federal statutory rate, rate | 21.00% | 21.00%
State income taxes, net of federal benefit | $ 214 | $ (73)
State income taxes, net of federal benefit, rate | 2.30% | (2.40%)
Permanent differences | $ 251 | $ (60)
Permanent differences, rate | 2.60% | 2.00%
Foreign tax rate differential | $ 717 | $ 304
Foreign tax rate differential | 7.60% | 10.00%
GILTI tax | $ 527 | $ 439
GILTI tax | 5.60% | 14.40%
Other | $ (107) | $ 154
Other, rate | 1.10% | 5.50%
Net expense | $ 3,578 | $ 1,402
Net expense, rate | 38.00% | 46.50%

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