Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net loss	$ (5,182,000)	$ (2,036,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	267,000	150,000
Stock-based compensation expense	10,000	42,000
Amortization of debt discount/premium, net	3,472,000	213,000
Loss on extinguishment of debt	239,000	0
Reserve for excess and slow-moving inventories	70,000	374,000
Net change in operating assets and liabilities:
Accounts receivable	271,000	(1,442,000)
Inventories	58,000	(383,000)
Prepaid expenses and other assets	778,000	103,000
Accounts payable	748,000	599,000
Interest payable - related party	(1,103,000)	(2,078,000)
Accrued payroll and related expenses	45,000	107,000
Deferred revenue – short term	(53,000)	441,000
Other current liabilities	53,000	(112,000)
Long-term deferred revenue and other noncurrent liabilities	(288,000)	(137,000)
Net cash used in operating activities	(615,000)	(4,159,000)
Cash flows from investing activities:
Capital expenditures	(771,000)	(65,000)
Net cash used in investing activities	(771,000)	(65,000)
Cash flows from financing activities:
Proceeds from sale of common stock and warrants, net	2,640,000	594,000
Proceeds from exercise of warrants	421,000	0
Net cash provided by financing activities	3,061,000	594,000
Effects of foreign currency rate changes on cash and cash equivalents	0	2,000
Net increase (decrease) in cash, cash equivalents and restricted cash	1,675,000	(3,628,000)
Cash, cash equivalents and restricted cash at beginning of period	4,177,000	7,280,000
Cash, cash equivalents and restricted cash at end of period	5,852,000	3,652,000
Supplemental disclosures of cash flow information:
Cash paid for interest	140,000	60,000
Cash paid for related party interest	1,492,000	2,628,000
Fair value of amended convertible note issued in connection with the extinguishment of original convertible note	1,239,000	0
Convertible note price reset	43,000	0
Promissory note converted to common stock	603,000	0
Related Party Convertible Debt Price Reset [Member]
Supplemental disclosures of cash flow information:
Convertible note price reset	$ 3,160,000	$ 213,000