CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 5,990	$ 3,085
Accounts receivable, net	424	415
Inventory, net	239	723
Prepaid expenses and other current assets	243	649
Total current assets	6,896	4,872
Property and equipment, net	0	3
Intangibles, net	0	604
Operating lease, right-of-use assets, net	17	142
Other assets	12	40
Total assets	6,925	5,661
Current liabilities:
Accounts payable	211	184
Accrued expenses and other current liabilities	1,038	1,074
Current portion deferred revenue	132	436
Operating lease liabilities, current	17	219
Total current liabilities	1,398	1,913
Long-term liabilities:
Operating lease liabilities, net of current portion	0	17
Deferred revenue, net of current portion	26	114
Total long-term liabilities	26	131
Total liabilities	1,424	2,044
Commitments and contingencies (see Note 14)
Stockholders’ equity:
Common stock, $.0001 par value; 150,000,000 shares authorized; 16,692,000 shares issued and 16,685,000 shares outstanding at December 31, 2023 and 2,071,000 shares issued and 2,063,000 outstanding at December 31, 2022	2	0
Treasury stock, 8,000 common shares at December 31, 2023 and 2022	(181)	(181)
Additional paid-in capital	233,911	227,645
Accumulated deficit	(228,231)	(223,847)
Total stockholders’ equity	5,501	3,617
Total liabilities and stockholders’ equity	6,925	5,661
Series F Preferred Stock
Stockholders’ equity:
Preferred stock Series F, convertible; $.0001 par value; $2,064,063 stated value; 42,000 shares authorized, 1,930 and zero shares issued and outstanding at December 31, 2023 and December 31, 2022, respectively	$ 0	$ 0