STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Cash flows from operating activities:
Net loss	$ (6,383)	$ (6,184)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	264	326
Depreciation and amortization	135	156
Operating lease liability	135	(8)
Bad debt expense	14	2
Accretion of interest on held-to-maturity investments	(30)	0
Gain on sale of equipment	0	(28)
Changes in operating assets and liabilities:
Accounts receivable	121	(242)
Prepaid expenses and other current assets	80	11
Inventory	(200)	1
Other assets	22	(36)
Accounts payable	(32)	65
Accrued expenses	105	(90)
Deferred revenue	19	(6)
Net cash used in operating activities	(5,750)	(6,033)
Cash flows from investing activities:
Purchase of held-to-maturity investments	(2,964)	0
Maturity of held-to-maturity investments	2,000	0
Proceeds received on sale of property and equipment	0	28
Purchase of property and equipment	(138)	(84)
Net cash used in investing activities	(1,102)	(56)
Cash flows from financing activities:
Proceeds from the issuance of common stock, net	2,706	38
Proceeds from the exercise of warrants, net	10,470	1,980
Proceeds from the issuance of notes payable	0	25
Repayments of notes payable	(56)	(42)
Net cash provided by financing activities	13,120	2,001
Increase (decrease) in cash and cash equivalents	6,268	(4,088)
Cash and cash equivalents, beginning of year	1,307	5,395
Cash and cash equivalents, end of year	7,575	1,307
Cash paid for:
Interest paid	22	22
Income taxes paid	0	0
Non-cash investing and financing activities:
Operating lease entered into for right-to-use asset	2,439	0
Notes payable incurred for the purchase of certain equipment	$ 0	$ 90