Note 12 - Income Taxes - Schedule of Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Federal net operating loss carryforward	$ 11,163	$ 11,737
Stock compensation	337	684
Accrued compensation	57	86
Basis of intangible assets	132	147
Capital loss carryforward	1,631	1,719
Other	5	0
Valuation allowance	(7,896)	(9,407)
Total deferred tax assets	5,429	4,966
Basis of property, plant and equipment	3,189	3,636
Prepaid expenses	219	212
Basis in foreign entity	2,021	1,118
Other	0	0
Total deferred tax liabilities	5,429	4,966
Net deferred tax liabilities	$ 0	$ 0