STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities:
Net loss	$ (6,184)	$ (7,710)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	156	135
Stock-based compensation	326	555
Gain on sale of equipment	(28)	0
Bad debt expense	2	(2)
Changes in operating assets and liabilities:
Accounts receivable	(242)	20
Prepaid expenses and other current assets	11	(10)
Inventory	1	58
Other assets	(44)	(4)
Accounts payable	65	(390)
Accrued expenses	(90)	(192)
Deferred revenue	(6)	(26)
Net cash used in operating activities	(6,033)	(7,566)
Cash flows from investing activities:
Proceeds received on sale of property and equipment	28	0
Purchase of property and equipment	(84)	(149)
Net cash used in investing activities	(56)	(149)
Cash flows from financing activities:
Proceeds from the issuance of common stock, net	38	5,407
Proceeds from the exercise of warrants, net	1,980	2,831
Proceeds from the issuance of notes payable	25	114
Repayments of notes payable	(42)	(6)
Payment of employee withholding taxes related to share based awards	0	(11)
Net cash provided by financing activities	2,001	8,335
Increase (decrease) in cash and cash equivalents	(4,088)	620
Cash and cash equivalents, beginning of year	5,395	4,775
Cash and cash equivalents, end of year	1,307	5,395
Cash paid for:
Interest paid	22	4
Income taxes paid	0	0
Non-cash investing and financing activities:
Notes payable incurred for the purchase of certain equipment	$ 90	$ 81