Accrued Liabilities (Details) - Accrued Liabilities - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Accrued Liabilities (Details) - Accrued Liabilities [Line Items]
Interest payable	$ 1,966,000	$ 1,513,000
Taxes payable	1,259,000	1,179,000
Current portion of pension liability (see Note 15 – Pension Plan)	840,000
Compensation and employee benefits	355,000	311,000
Warranty reserve	287,000	562,000
Deferred revenues	94,000	140,000
Audit fees	74,000	134,000
Other	477,000	440,000
Accrued Liabilities, Total	$ 5,352,000	$ 4,279,000