Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 25,244	$ 38,757
Receivables	18	29
Prepaid expenses and other current assets	1,749	561
Total current assets	27,011	39,347
Property and equipment, net	26	24
Other non-current assets	1	1
Total assets	27,038	39,372
Current liabilities:
Accounts payable	6,148	3,860
Accrued expenses and other current liabilities	3,300	3,960
Deferred revenue	226	226
Total current liabilities	9,674	8,046
Deferred revenue, non-current	2,847	3,017
Total liabilities	12,521	11,063
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.01 par value, 5,000,000 shares authorized, none issued and outstanding at September 30, 2023 and December 31, 2022
Common stock, $0.01 par value, 125,000,000 shares authorized, 21,003,409 and 20,925,992 shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively	210	209
Additional paid in capital	492,784	491,816
Accumulated deficit	(478,447)	(463,683)
Accumulated other comprehensive loss	(30)	(33)
Total stockholders' equity	14,517	28,309
Total liabilities and stockholders' equity	$ 27,038	$ 39,372