Note 7 - Income Taxes - Summary of Deferred Tax Liability (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Net operating loss carryforward	$ 103	$ 114
Foreign tax credits	483	483
Accrued expenses	580	649
Allowance for doubtful accounts	85	144
Stock-based compensation	384	336
Other intangible assets	36	45
Interest expense limitation	11
Less: Valuation allowance - forfeiture of stock options	(340)
Total deferred income tax asset	1,342	1,771
Property and equipment	(393)	(545)
Intangible assets-brand name	(1,079)	(1,079)
Goodwill	(257)	(497)
Other intangible assets	(338)	(281)
Total deferred income tax liability	(2,067)	(2,402)
Net deferred tax liability	$ (725)	$ (631)