CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 296	$ 747
Accounts receivable, net	1,975	3,522
Inventories	1,955	2,164
Prepaids and other assets	436	1,539
Total current assets	4,662	7,972
Long-term assets:
Rental equipment, net	1,487	2,016
Property, plant and equipment, net	2,206	2,286
Goodwill	744	744
Restricted cash	950	1,162
Other assets	739	804
Total long-term assets	6,126	7,012
TOTAL ASSETS	10,788	14,984
Current liabilities:
Accounts payable	3,850	2,778
Accrued liabilities	6,255	5,781
Current portion of long-term debt	2,060	3,529
Current portion of long-term debt - related party	1,000	500
Customer deposits	667	1,135
Total current liabilities	13,832	13,723
Long-term liabilities:
Long-term debt, less current portion	1,410	1,034
Long-term debt - related party, less current portion		500
Deferred pension liability and other	3,287	3,638
Total long-term liabilities	4,697	5,172
Total liabilities	18,529	18,895
Stockholders' deficit:
Preferred Stock Series A - $20 stated value - 416,500 shares authorized; shares issued and outstanding: 0 in 2018 and 2017 and Preferred Stock Series B - $200 stated value - 51,000 shares authorized; shares issued and outstanding: 16,512 in 2018 and 2017 (liquidation preference $3,393,000)	3,302	3,302
Common Stock - $0.001 par value - 10,000,000 shares authorized; shares issued: 2,317,024 in 2018 and 2,190,011 in 2017; shares outstanding: 2,289,184 in 2018 and 2,162,171 in 2017	2	2
Additional paid-in-capital	28,560	28,273
Accumulated deficit	(30,937)	(26,889)
Accumulated other comprehensive loss	(5,605)	(5,536)
Treasury stock - at cost - 27,840 common shares in 2018 and 2017	(3,063)	(3,063)
Total stockholders' deficit	(7,741)	(3,911)
TOTAL LIABILITIES AND STOCKHOLDERS' DEFICIT	10,788	14,984
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 2018 and 2017 and Preferred Stock Series B - $200 stated value - 51,000 shares authorized; shares issued and outstanding: 16,512 in 2018 and 2017 (liquidation preference $3,393,000)
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 2018 and 2017 and Preferred Stock Series B - $200 stated value - 51,000 shares authorized; shares issued and outstanding: 16,512 in 2018 and 2017 (liquidation preference $3,393,000)	$ 3,302	$ 3,302