Note 6 - Income Taxes - Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Unrealized loss on investments	$ 1,045	$ 788
IRC section 174 costs	1,566	822
Fixed assets	(1,111)	(1,441)
Other	118
Other		(124)
Total deferred tax asset	1,618	45
Less valuation allowance	(517)	(517)
Net deferred tax liability	$ 1,101
Net deferred tax liability		$ (472)