Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 37,499	$ 36,640
Marketable securities, available for-sale	0	7,762
Restricted cash	50	0
Prepaid expenses and other current assets	491	851
Total current assets	38,040	45,253
Total assets	38,040	45,253
Current liabilities:
Accounts payable	1,375	3,435
Accrued liabilities	4,874	2,687
Total current liabilities	6,249	6,122
Total liabilities	6,249	6,122
Stockholders' (deficit) equity:
Preferred stock, $0.01 par value; 10,000,000 shares authorized, no shares issued and outstanding as of December 31, 2023 and 2022	0	0
Common stock, $0.01 par value; 200,000,000 shares authorized, 3,116,729 and 4,025,489 shares issued and outstanding as of December 31, 2023 and 2022	31	40
Additional paid-in-capital	187,122	172,575
Accumulated other comprehensive loss	(0)	(57)
Accumulated deficit	(155,362)	(133,427)
Total stockholders' equity	31,791	39,131
Total liabilities and stockholders' equity	$ 38,040	$ 45,253