Note 13 - Income Taxes - Schedule of Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Federal net operating loss carryforward	$ 11,737	$ 12,027
Accrued interest to related parties, not deductible until paid	0	0
Stock compensation	684	511
Accrued compensation	86	56
Basis of intangible assets	147	191
Capital loss carryforward	1,719	1,719
Other	0	28
Valuation allowance	(9,407)	(9,774)
Total deferred tax assets	4,966	4,758
Basis of property, plant and equipment	3,636	4,139
Prepaid expenses	212	225
Basis in foreign entity	1,118	394
Other	0	0
Total deferred tax liabilities	4,966	4,758
Net deferred tax liabilities	$ 0	$ 0