Note 6 - Income Taxes - Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Unrealized loss on investments	$ 788	$ 582
Foreign Tax Credit	124
Fixed assets	1,347	370
Other	134	95
Total deferred tax (liability) asset	(301)
Total deferred tax (liability) asset		307
Less valuation allowance	(517)	(582)
Net deferred tax liability	$ (818)	$ (275)