Note 11 - Income Taxes - Deferred Income Tax Assets (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Property and equipment	$ (858,000)	$ (920,000)
Intangible assets	102,000
Intangible assets		(11,000)
Inventory reserve	61,000	32,000
Accrued expenses and inventory	199,000	191,000
Right of Use Asset	(1,281,000)	0
Foreign exchange	16,000	12,000
Lease Liability	1,289,000	0
AMT/Foreign tax credits	141,000	128,000
State income taxes	(111,000)	(196,000)
Net deferred income tax liabilities	$ (442,000)	$ (764,000)