Note 2 - Discontinued Operation and Assets and Liabilities Related to Discontinued Operation - Discontinued Operations Financial Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Loss from discontinued operation before income taxes	$ (43,000)	$ (386,000)	$ (72,000)	$ (7,326,000)
Income tax benefit	0	0	0	0
Loss from discontinued operation, net of tax	(43,000)	(386,000)	(72,000)	(7,326,000)
Liabilities related to discontinued operation	27,000		27,000		$ 213,000
Discontinued Operations, Held-for-Sale [Member] | Ontario Knife Company [Member]
Net Sales	0	336,000	0	3,423,000
Operating costs	(33,000)	(739,000)	(90,000)	(5,316,000)
Loss from discontinued operation	(33,000)	(403,000)	(90,000)	(1,893,000)
Loss from discontinued operation - impairment and divestiture costs	(10,000)	(79,000)	18,000	(2,306,000)
Change in purchase price	(0)	96,000	(0)	(3,127,000)
Loss from discontinued operation before income taxes	(43,000)	(386,000)	(72,000)	(7,326,000)
Income tax benefit	0	0	0	0
Loss from discontinued operation, net of tax	(43,000)	$ (386,000)	(72,000)	$ (7,326,000)
Accounts receivable	0		0		38,000
Prepaid and other assets	38,000		38,000		31,000
Inventories	0		0		55,000
Building, net of estimated costs to sell	1,428,000		1,428,000		1,428,000
Assets related to discontinued operation	1,466,000		1,466,000		1,552,000
Accounts payable	24,000		24,000		197,000
Accrued employee compensation and other costs	3,000		3,000		16,000
Liabilities related to discontinued operation	$ 27,000		$ 27,000		$ 213,000