BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 1,307	$ 5,395
Accounts receivable, net	335	95
Prepaid expenses and other current assets	377	388
Inventory, net	794	795
Total current assets	2,813	6,673
Right to use assets, operating leases	0	210
Property and equipment, net	407	388
Other noncurrent assets	58	22
Total assets	3,278	7,293
Current liabilities:
Accounts payable	215	150
Accrued expenses	278	368
Current portion of operating lease liability	0	217
Current portion of notes payable	56	33
Deferred revenue	12	18
Total current liabilities	561	786
Notes payable, less current portion	206	156
Total liabilities	767	942
Commitments and contingencies (see notes)
Stockholders’ equity:
Preferred stock, $0.001 par value, 10,000,000 shares authorized, none issued and outstanding	0	0
Common stock, $0.001 par value, 100,000,000 shares authorized, 1,035,893 and 514,003 shares issued and outstanding as of December 31, 2024 and 2023, respectively	1	1
Additional paid-in capital	138,607	136,263
Accumulated deficit	(136,097)	(129,913)
Total stockholders’ equity	2,511	6,351
Total liabilities and stockholders’ equity	$ 3,278	$ 7,293