CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 535,000	$ 723,000
Receivables, net	2,381,000	2,271,000
Inventories	2,182,000	2,201,000
Prepaids and other assets	807,000	417,000
Total current assets	5,905,000	5,612,000
Long-term assets:
Rental equipment, net	927,000	1,310,000
Property, plant and equipment, net	2,284,000	2,180,000
Right of use assets	1,141,000
Goodwill	744,000	744,000
Restricted cash	850,000	900,000
Other assets	403,000	720,000
Total long-term assets	6,349,000	5,854,000
TOTAL ASSETS	12,254,000	11,466,000
Current liabilities:
Accounts payable	945,000	3,728,000
Accrued liabilities	6,046,000	6,332,000
Current portion of long-term debt	1,572,000	2,584,000
Current portion of long-term debt - related party		1,000,000
Current lease liabilities	284,000
Customer deposits	123,000	432,000
Total current liabilities	8,970,000	14,076,000
Long-term liabilities:
Long-term debt, less current portion	650,000	1,446,000
Long-term lease liabilities	893,000
Deferred pension liability and other	3,485,000	3,708,000
Total long-term liabilities	5,028,000	5,154,000
Total liabilities	13,998,000	19,230,000
Stockholders' deficit:
Preferred Stock Series A - $20 stated value - 416,500 shares authorized; shares issued and outstanding: 0 in 2019 and 2018 & Preferred Stock Series B - $200 stated value - 51,000 shares authorized; shares issued and outstanding: 0 in 2019 and 16,512 in 2018		3,302,000
Common Stock - $0.001 par value - 30,000,000 shares authorized; shares issued: 13,474,116 in 2019 and 3,652,813 in 2018; shares outstanding: 13,446,276 in 2019 and 3,624,973 in 2018	13,000	4,000
Additional paid-in-capital	41,088,000	30,069,000
Accumulated deficit	(33,164,000)	(31,682,000)
Accumulated other comprehensive loss	(6,618,000)	(6,394,000)
Treasury stock - at cost - 27,840 common shares in 2019 and 2018	(3,063,000)	(3,063,000)
Total stockholders' deficit	(1,744,000)	(7,764,000)
TOTAL LIABILITIES AND STOCKHOLDERS' DEFICIT	12,254,000	11,466,000
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 2019 and 2018 & Preferred Stock Series B - $200 stated value - 51,000 shares authorized; shares issued and outstanding: 0 in 2019 and 16,512 in 2018
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 2019 and 2018 & Preferred Stock Series B - $200 stated value - 51,000 shares authorized; shares issued and outstanding: 0 in 2019 and 16,512 in 2018		$ 3,302,000