BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 5,395	$ 4,775
Accounts receivable, net	95	113
Prepaid expenses	388	378
Inventory, net	795	853
Total current assets	6,673	6,119
Right to use assets, operating leases	210	347
Property and equipment, net	388	294
Other noncurrent assets	22	22
Total assets	7,293	6,782
Current liabilities:
Accounts payable	150	540
Accrued expenses	368	560
Current portion of operating lease liability	217	180
Current portion of notes payable	33	0
Deferred revenue	18	44
Total current liabilities	786	1,324
Operating lease liability, less current portion	0	179
Notes payable, less current portion	156	0
Total liabilities	942	1,503
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, 5,140,024 and 67,472 shares issued and outstanding as of December 31, 2023 and 2022, respectively	5	0
Additional paid-in capital	136,259	127,482
Accumulated deficit	(129,913)	(122,203)
Total stockholders’ equity	6,351	5,279
Total liabilities and stockholders’ equity	$ 7,293	$ 6,782