Note 2 - Discontinued Operation and Assets and Liabilities Related to Discontinued Operation - Discontinued Operations Financial Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Loss from discontinued operation before income taxes	$ (17,000)	$ (17,000)
Loss from discontinued operation, net of tax	(17,000)	(17,000)
Discontinued Operations, Held-for-Sale [Member] | Ontario Knife Company [Member]
Operating costs	(17,000)	(25,000)
Loss from discontinued operation	(17,000)	(25,000)
Gain from discontinued operation - impairment and divestiture recovery costs	0	8,000
Loss from discontinued operation before income taxes	(17,000)	(17,000)
Loss from discontinued operation, net of tax	(17,000)	$ (17,000)
Prepaid and other assets	22,000		$ 8,000
Building, net of estimated costs to sell	1,428,000		1,428,000
Assets related to discontinued operation	1,450,000		1,436,000
Accounts payable	23,000		23,000
Liabilities related to discontinued operation	$ 23,000		$ 23,000