CONDENSED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net loss	$ (1,832,000)	$ (2,037,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	37,000	36,000
Stock-based compensation	85,000	166,000
Bad debt expense	0	(2,000)
Changes in operating assets and liabilities:
Accounts receivable	(66,000)	69,000
Prepaid expenses	42,000	28,000
Inventory	(79,000)	38,000
Other assets	(2,000)	(1,000)
Accounts payable	(34,000)	(325,000)
Accrued expenses	23,000	24,000
Deferred revenue	(3,000)	(11,000)
Net cash used in operating activities	(1,829,000)	(2,015,000)
Cash flows from investing activities:
Purchase of property and equipment	(2,000)	(1,000)
Net cash used in investing activities	(2,000)	(1,000)
Cash flows from financing activities:
Repayments of notes payable	(8,000)	0
Proceeds from the exercise of warrants	6,000	0
Payment of employee withholding taxes related to share based awards	0	(11,000)
Net cash used in financing activities	(2,000)	(11,000)
Decrease in cash and cash equivalents	(1,833,000)	(2,027,000)
Cash and cash equivalents, beginning of period	5,395,000	4,775,000
Cash and cash equivalents, end of period	3,562,000	2,748,000
Supplemental cash flow information is as follows:
Cash paid for interest	4,000	0
Cash paid for income taxes	$ 0	$ 0