Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash Flows from Operating Activities:
Net loss	$ (1,390,000)	$ 706,000
Reconciliation of net (loss) income to net cash used in operating activities:
Allowance for doubtful accounts	86,000	97,000
Depreciation and amortization	42,000	67,000
Accretion of debt discount	81,000	0
Change in fair value of derivative liabilities	(223,000)	(340,000)
Debt extinguishment gain	35,000	0
Amortization of operating lease right-of-use asset	90,000	117,000
Stock based compensation	45,000	18,000
Subtotal of non-cash charges	86,000	(41,000)
Changes in operating assets and liabilities:
Accounts receivable	400,000	(446,000)
Inventories	324,000	309,000
Prepaid expenses and other current assets	231,000	(471,000)
Other assets	0	(2,000)
Accounts payable and accrued expenses	(126,000)	(384,000)
Deferred revenue	323,000	78,000
Lease liabilities	(89,000)	(121,000)
Net cash used in operating activities	(241,000)	(372,000)
Cash Flows from Investing Activities:
Purchase of property, plant and equipment	0	(85,000)
Net cash used in investing activities	0	(85,000)
Cash Flows from Financing Activities:
Proceeds from issuance of notes payable	630,000	0
Repayment of notes payable	(263,000)	0
Net cash provided by financing activities	367,000	0
Net increase (decrease) in cash	126,000	(457,000)
Cash, beginning of the period	257,000	866,000
Cash, end of the period	383,000	409,000
Supplemental disclosure of cash flow information
Cash paid for interest	90,000	0
Cash paid for interest to related party	8,000	0
Cash paid for income taxes	4,000	0
Conversion of Series A convertible preferred stock	1,000	14,000
Issuance of common stock for dividend payment	$ 0	$ 770,000