CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 431,000	$ 723,000
Receivables, net	2,429,000	2,271,000
Inventories	2,062,000	2,201,000
Prepaids and other assets	519,000	417,000
Total current assets	5,441,000	5,612,000
Long-term assets:
Rental equipment, net	1,204,000	1,310,000
Property, plant and equipment, net	2,128,000	2,180,000
Right of use assets	1,373,000
Goodwill	744,000	744,000
Restricted cash	900,000	900,000
Other assets	720,000	720,000
Total long-term assets	7,069,000	5,854,000
TOTAL ASSETS	12,510,000	11,466,000
Current liabilities:
Accounts payable	3,197,000	3,728,000
Accrued liabilities	6,751,000	6,332,000
Current portion of long-term debt	1,094,000	2,584,000
Current portion of long-term debt - related party	1,000,000	1,000,000
Current lease liabilities	353,000
Customer deposits	246,000	432,000
Total current liabilities	12,641,000	14,076,000
Long-term liabilities:
Long-term debt, less current portion	1,482,000	1,446,000
Long-term lease liabilities	1,054,000
Deferred pension liability and other	3,641,000	3,708,000
Total long-term liabilities	6,177,000	5,154,000
Total liabilities	18,818,000	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 and Preferred Stock Series B - $200 stated value - 51,000 shares authorized; shares issued and outstanding: 648 in 2019 and 16,512 in 2018 (liquidation preference $141,000)	130,000	3,302,000
Common Stock - $0.001 par value - 30,000,000 shares authorized; shares issued: 7,301,069 in 2019 and 3,652,813 in 2018; shares outstanding: 7,273,229 in 2019 and 3,624,973 in 2018	7,000	4,000
Additional paid-in-capital	35,238,000	30,069,000
Accumulated deficit	(32,278,000)	(31,682,000)
Accumulated other comprehensive loss	(6,342,000)	(6,394,000)
Treasury stock - at cost - 27,840 common shares in 2019 and 2018	(3,063,000)	(3,063,000)
Total stockholders' deficit	(6,308,000)	(7,764,000)
TOTAL LIABILITIES AND STOCKHOLDERS' DEFICIT	12,510,000	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 and Preferred Stock Series B - $200 stated value - 51,000 shares authorized; shares issued and outstanding: 648 in 2019 and 16,512 in 2018 (liquidation preference $141,000)
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 and Preferred Stock Series B - $200 stated value - 51,000 shares authorized; shares issued and outstanding: 648 in 2019 and 16,512 in 2018 (liquidation preference $141,000)	$ 130,000	$ 3,302,000