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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, 2021	Dec. 31, 2020
Foreign tax credits and general business credits	$ 13,531	$ 11,203
Deferred revenue	5,694	5,739
Net operating losses	537	1,452
Accruals, including foreign exchange and other	2,991	792
Sub-total Deferred tax assets	22,753	19,186
Valuation allowance	(13,531)	(11,232)
Total deferred tax assets	9,222	7,954
Prepaid registry fees and expenses	(18,165)	(16,909)
Amortization	(6,578)	(7,083)
Limited life intangible assets	(3,229)	(4,327)
Indefinite life intangible assets	(2,969)	(2,847)
Foreign branch deferred tax liabilities	(828)	(1,256)
Total deferred tax liability	(31,769)	(32,422)
Net deferred tax liability	$ (22,547)	$ (24,468)

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