CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Current assets:
Cash and cash equivalents	$ 6,804	$ 7,575
Short-term investments	0	994
Accounts receivable, net	163	201
Inventory	1,048	994
Prepaid expenses and other current assets	338	297
Total current assets	8,353	10,061
Right to use asset, operating lease	2,295	2,336
Property and equipment, net	379	410
Other noncurrent assets	36	36
Total assets	11,063	12,843
Current liabilities:
Accounts payable	115	183
Accrued expenses	593	383
Current portion of operating lease liability	142	139
Current portion of notes payable	63	61
Deferred revenue	25	32
Total current liabilities	938	798
Operating lease liability, less current portion	2,296	2,332
Notes payable, less current portion	128	145
Total liabilities	3,362	3,275
Commitments and contingencies (see notes)
Stockholders’ equity:
Preferred stock, $0.001 par value, 10,000,000 shares authorized, none issued and outstanding as of March 31, 2026 and December 31, 2025	0	0
Common stock, $0.001 par value, 100,000,000 shares authorized, 5,303,426 and 5,223,015 shares issued and outstanding as of March 31, 2026 and December 31, 2025, respectively	5	5
Additional paid-in capital	152,239	152,043
Accumulated deficit	(144,543)	(142,480)
Total stockholders’ equity	7,701	9,568
Total liabilities and stockholders’ equity	$ 11,063	$ 12,843