Note 7 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Allowance for doubtful accounts	$ 29	$ 35
Accrued expenses	696	537
Share-based compensation	735	1,267
Accrued bonuses	145	120
Employer payroll tax deferral	323
Foreign tax credit from repatriation		535
Other	27
Gross deferred tax assets	1,955	2,494
Less valuation allowance		(535)
Deferred tax assets	1,955	1,959
Deferred tax liabilities:
Prepaid expenses	93	135
Deferred contract costs	1,111	990
Property and equipment	1,725	1,926
Intangible assets	6,109	5,553
Repatriation withholding	174	528
Unrealized translation gain on intercompany loan		214
Other	8	12
Deferred tax liabilities	9,220	9,358
Net deferred tax liabilities	$ (7,265)	$ (7,399)