CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities
Net loss	$ (4,968,000)	$ (4,843,000)
Adjustment to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	495,000	540,000
Amortization of right of use assets	303,000	283,000
Write off of goodwill		744,000
Amortization of deferred financing fees and debt discount	127,000	98,000
Loss on disposal of assets		5,000
Gain on extinguishment of debt	(77,000)	(137,000)
Loss on foreign currency remeasurement	18,000	57,000
Issuance of warrants		242,000
Bad debt expense	64,000	123,000
Changes in operating assets and liabilities:
Accounts receivable, net	(832,000)	878,000
Inventories	671,000	640,000
Prepaids and other assets	(1,210,000)	598,000
Accounts payable	3,608,000	695,000
Accrued liabilities	660,000	(1,357,000)
Operating lease liabilities	(298,000)	(284,000)
Customer deposits	1,427,000	401,000
Deferred pension liability and other	(125,000)	(564,000)
Net cash used in operating activities	(137,000)	(1,881,000)
Cash flows from investing activities
Equipment manufactured for rental		(16,000)
Purchases of property, plant and equipment		(174,000)
Net cash used in investing activities		(190,000)
Cash flows from financing activities
Proceeds from long-term debt	1,078,000	1,423,000
Payments of long-term debt	(460,000)	(650,000)
Payments for deferred financing fees		(40,000)
Net cash provided by financing activities	618,000	733,000
Effect of exchange rate changes		(4,000)
Net increase (decrease) in cash, cash equivalents and restricted cash	481,000	(1,342,000)
Cash and cash equivalents at beginning of year	43,000	1,385,000
Cash and cash equivalents at end of period	524,000	43,000
Supplemental disclosure of cash flow information:
Interest paid	219,000	263,000
Income taxes paid	9,000	15,000
Current assets
Cash and cash equivalents	524,000	43,000
Cash and cash equivalents at end of period	$ 524,000	$ 43,000