CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash	$ 3,714	$ 3,085
Accounts receivable, net	392	415
Inventory, net	634	723
Prepaid expenses and other current assets	947	649
Total current assets	5,687	4,872
Property and equipment, net	3	3
Intangibles, net	518	604
Operating lease - right of use asset, net	99	142
Other assets	31	40
Total assets	6,338	5,661
Current liabilities:
Accounts payable	207	184
Accrued expenses and other current liabilities	1,665	1,074
Current portion of deferred revenue	341	436
Current portion of operating lease liabilities	139	219
Total current liabilities	2,352	1,913
Long-term liabilities:
Operating lease liabilities, net of current portion	0	17
Deferred revenue, net of current portion	84	114
Total liabilities	2,436	2,044
Commitments and contingencies (see Note 11)
Stockholders’ equity:
Preferred stock Series F, convertible; $.0001 par value; $6,550,000 stated value; 42,000 shares authorized, 6,550 and zero shares issued and outstanding at March 31, 2023 and December 31, 2022, respectively	0	0
Common stock, $.0001 par value; 150,000,000 shares authorized; 2,070,861 shares issued and 2,063,308 outstanding at March 31, 2023 and December 31, 2022	0	0
Treasury stock, 7,553 shares of common stock at March 31, 2023 and December 31, 2022	(181)	(181)
Additional paid-in capital	229,149	227,645
Accumulated deficit	(225,066)	(223,847)
Total stockholders' equity	3,902	3,617
Total liabilities and stockholders’ equity	$ 6,338	$ 5,661