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Note 9 - Income Taxes - Tax Effects of Temporary Differences That Give Rise to Significant Portions of the Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred tax assets: |  |
Deferred revenue | $ 6,301 | $ 6,497
Foreign tax credits and general business credits | 9,004 | 3,864
Net operating losses | 1,341 | 1,892
Accruals, including foreign exchange and other | 1,490 | 1,955
Sub-total Deferred tax assets | 18,136 | 14,208
Valuation allowance | (9,365) | (4,087)
Total deferred tax assets | 8,771 | 10,121
Deferred tax liabilities: |  |
Prepaid registry fees and expenses | (16,237) | (15,950)
Amortization | (6,925) | (5,871)
Limited life intangible assets | (5,958) | (6,115)
Indefinite life intangible assets | (3,110) | (3,110)
Foreign branch deferred tax liability | (2,012) |
Total deferred tax liability | (34,242) | (31,046)
Net deferred tax liability | $ (25,471) | $ (20,925)

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