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14. Income Tax (Details 2) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |
Income tax expense (benefit) at the federal statutory rate | $ (8,052) | $ (7,619)
State tax expense (benefit) | (48) | (632)
Foreign tax rate differential | 900 | 450
Stock-based compensation | 133 | 150
Interest Expense | 478 | 0
GILTI Inclusion | 849 | 97
Other | 166 | (47)
Valuation allowance | 1,493 | 7,608
Income tax expense | $ 1,131 | $ 7
Effective tax rate | (2.95%) | (0.02%)

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