Discontinued Operation and Assets and Liabilities Related to Discontinued Operation - Results of operations classified as a discontinued operation, net of tax, in the Condensed Consolidated Statements of Operations (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Results of operations classified as a discontinued operation, net of tax
Loss from discontinued operation before income taxes	$ (17,000)	$ (720,000)
Income tax benefit		153,000
Loss from discontinued operation, net of tax (Note 2)	(17,000)	(567,000)
Held for sale | OKC
Results of operations classified as a discontinued operation, net of tax
Net Sales		1,742,000
Operating costs	(25,000)	(2,462,000)
Loss from discontinued operation	(25,000)	(720,000)
Change in divestiture and impairment cost estimates	8,000
Loss from discontinued operation before income taxes	(17,000)	(720,000)
Income tax benefit		153,000
Loss from discontinued operation, net of tax (Note 2)	$ (17,000)	$ (567,000)