CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 169,000	$ 185,000
Receivables, net	1,950,000	1,531,000
Inventories	1,811,000	2,372,000
Prepaids and other assets	247,000	148,000
Total current assets	4,177,000	4,236,000
Long-term assets:
Rental equipment, net	82,000	111,000
Property, plant and equipment, net	1,652,000	1,778,000
Right of use assets	1,788,000	1,971,000
Restricted cash	200,000	200,000
Other assets	34,000	34,000
Total long-term assets	3,756,000	4,094,000
TOTAL ASSETS	7,933,000	8,330,000
Current liabilities:
Accounts payable	9,249,000	8,420,000
Accrued liabilities	6,029,000	5,352,000
Current portion of long-term debt	3,776,000	3,776,000
Current lease liabilities	378,000	352,000
Customer deposits	779,000	213,000
Total current liabilities	20,211,000	18,113,000
Long-term liabilities:
Long-term debt, less current portion	531,000	535,000
Long-term lease liabilities	1,447,000	1,644,000
Deferred pension liability and other	2,153,000	2,248,000
Total long-term liabilities	4,131,000	4,427,000
Total liabilities	24,342,000	22,540,000
Stockholders' deficit:
Preferred Stock Series A - $20 stated value - 416,500 shares authorized; shares issued and outstanding: 0 in 2024 and 2023 and Preferred Stock Series B - $200 stated value - 51,000 shares authorized; shares issued and outstanding: 0 in 2024 and 2023
Common Stock - $0.001 par value - 30,000,000 shares authorized; shares issued: 13,524,116 in 2024 and 2023 shares outstanding: 13,496,276 in 2024 and 2023	13,000	13,000
Additional paid-in-capital	41,508,000	41,508,000
Accumulated deficit	(48,846,000)	(46,719,000)
Accumulated other comprehensive loss	(6,021,000)	(5,949,000)
Treasury stock - at cost - 27,840 common shares in 2024 and 2023	(3,063,000)	(3,063,000)
Total stockholders' deficit	(16,409,000)	(14,210,000)
TOTAL LIABILITIES AND STOCKHOLDERS' DEFICIT	7,933,000	8,330,000
Convertible Preferred Stock [Member] | Series A Preferred Stock [Member]
Stockholders' deficit:
Preferred Stock Series A - $20 stated value - 416,500 shares authorized; shares issued and outstanding: 0 in 2024 and 2023 and Preferred Stock Series B - $200 stated value - 51,000 shares authorized; shares issued and outstanding: 0 in 2024 and 2023
Convertible Preferred Stock [Member] | Series B Preferred Stock [Member]
Stockholders' deficit:
Preferred Stock Series A - $20 stated value - 416,500 shares authorized; shares issued and outstanding: 0 in 2024 and 2023 and Preferred Stock Series B - $200 stated value - 51,000 shares authorized; shares issued and outstanding: 0 in 2024 and 2023