CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash	$ 6,766	$ 3,085
Accounts receivable, net	157	415
Inventory, net	324	723
Prepaid expenses and other current assets	330	649
Total current assets	7,577	4,872
Property and equipment, net	0	3
Intangibles, net	345	604
Operating lease - right of use asset, net	41	142
Other assets	16	40
Total assets	7,979	5,661
Current liabilities:
Accounts payable	106	184
Accrued expenses and other current liabilities	974	1,074
Current portion of deferred revenue	157	436
Current portion of operating lease liabilities	43	219
Total current liabilities	1,280	1,913
Long-term liabilities:
Operating lease liabilities, net of current portion	0	17
Deferred revenue, net of current portion	38	114
Total liabilities	1,318	2,044
Commitments and contingencies (see Note 11)
Stockholders’ equity:
Preferred stock Series F, convertible; $.0001 par value; $5,263,100 stated value; 42,000 shares authorized, 5,146 and zero shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively	0	0
Common stock, $.0001 par value; 150,000,000 shares authorized; 4,294,455 shares issued and 4,286,902 outstanding at September 30, 2023 and 2,070,861 shares issued and 2,063,308 shares outstanding at December 31, 2022	0	0
Treasury stock, 7,553 shares of common stock	(181)	(181)
Additional paid-in capital	233,852	227,645
Accumulated deficit	(227,010)	(223,847)
Total stockholders' equity	6,661	3,617
Total liabilities and stockholders’ equity	$ 7,979	$ 5,661