CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities
Net loss	$ (1,402,000)	$ (4,694,000)
Adjustment to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	668,000	952,000
Amortization of right of use assets	373,000
Amortization of gain on sale/leaseback transaction		(11,000)
Amortization of deferred financing fees and debt discount	96,000	238,000
Loss on disposal of assets	32,000
Loss on extinguishment of debt	193,000
Loss (gain) on foreign currency remeasurement	130,000	(225,000)
Issuance of common stock for compensation		10,000
Bad debt expense	(93,000)	1,550,000
Changes in operating assets and liabilities:
Accounts receivable, net	(18,000)	(300,000)
Inventories	19,000	(37,000)
Prepaids and other assets	(73,000)	1,206,000
Accounts payable	(2,783,000)	950,000
Accrued liabilities	(254,000)	615,000
Operating lease liabilities	(369,000)
Customer deposits	(309,000)	(703,000)
Deferred pension liability and other	(547,000)	(619,000)
Net cash used in operating activities	(4,337,000)	(1,068,000)
Cash flows from investing activities
Equipment manufactured for rental	(44,000)
Purchases of property, plant and equipment	(377,000)	(140,000)
Net cash used in investing activities	(421,000)	(140,000)
Cash flows from financing activities
Proceeds from long-term debt		1,000,000
Issuance of common stock		1,500,000
Proceeds from warrant exercise, net of costs	5,298,000
Proceeds from rights offering, net of costs	2,428,000
Payments of long-term debt	(3,037,000)	(1,483,000)
Payments of dividends on preferred stock	(80,000)	(99,000)
Payments for deferred financing fees	(25,000)
Payments for fees on extinguishment of debt	(62,000)
Net cash provided by financing activities	4,522,000	918,000
Effect of exchange rate changes	(2,000)	4,000
Net decrease in cash, cash equivalents and restricted cash	(238,000)	(286,000)
Cash, cash equivalents and restricted cash at beginning of year	1,623,000	1,909,000
Cash, cash equivalents and restricted cash at end of period	1,385,000	1,623,000
Supplemental disclosure of cash flow information:
Interest paid	239,000	555,000
Income taxes paid	22,000	26,000
Supplemental non-cash financing activities:
Preferred Stock Series B converted to Common Stock	3,302,000
Current assets
Cash and cash equivalents	535,000	723,000
Long-term assets
Restricted cash	850,000	900,000
Cash, cash equivalents and restricted cash at end of period	1,385,000	1,623,000
SMI & SMII [Member]
Supplemental non-cash financing activities:
Warrants issued to related party		288,000
Unilumin [Member]
Supplemental non-cash financing activities:
Warrants issued to related party		$ 964,000