CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net loss	$ (4,843,000)	$ (1,402,000)
Adjustment to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	540,000	668,000
Amortization of right of use assets	283,000	373,000
Write off of goodwill	744,000
Amortization of deferred financing fees and debt discount	98,000	96,000
Loss on disposal of assets	5,000	32,000
(Gain) loss on extinguishment of debt	(137,000)	193,000
Loss on foreign currency remeasurement	57,000	130,000
Issuance of warrants	242,000
Bad debt expense	123,000	(93,000)
Changes in operating assets and liabilities:
Accounts receivable, net	878,000	(18,000)
Inventories	640,000	19,000
Prepaids and other assets	598,000	(73,000)
Accounts payable	695,000	(2,783,000)
Accrued liabilities	(1,357,000)	(254,000)
Operating lease liabilities	(284,000)	(369,000)
Customer deposits	401,000	(309,000)
Deferred pension liability and other	(564,000)	(547,000)
Net cash used in operating activities	(1,881,000)	(4,337,000)
Cash flows from investing activities
Equipment manufactured for rental	(16,000)	(44,000)
Purchases of property, plant and equipment	(174,000)	(377,000)
Net cash used in investing activities	(190,000)	(421,000)
Cash flows from financing activities
Proceeds from long-term debt	1,423,000
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	(650,000)	(3,037,000)
Payments of dividends on preferred stock		(80,000)
Payments for deferred financing fees	(40,000)	(25,000)
Payments for fees on extinguishment of debt		(62,000)
Net cash provided by financing activities	733,000	4,522,000
Effect of exchange rate changes	(4,000)	(2,000)
Net decrease in cash, cash equivalents and restricted cash	(1,342,000)	(238,000)
Cash, cash equivalents and restricted cash at beginning of year	1,385,000	1,623,000
Cash, cash equivalents and restricted cash at end of period	43,000	1,385,000
Supplemental disclosure of cash flow information:
Interest paid	263,000	239,000
Income taxes paid	15,000	22,000
Supplemental non-cash financing activities:
Preferred Stock Series B converted to Common Stock		3,302,000
Current assets
Cash and cash equivalents	43,000	535,000
Long-term assets
Restricted cash		850,000
Cash, cash equivalents and restricted cash at end of period	$ 43,000	$ 1,385,000