Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 20,525	$ 86,508
Short-term investments	205,912	39,000
Prepaid expenses and other current assets	1,253	1,567
Total current assets	227,690	127,075
Right-of-use asset	948	394
Other assets	1,995	45
Total assets	230,633	127,514
Current liabilities:
Accounts payable	788	1,557
Accrued expenses	7,690	3,281
Current portion of operating lease liabilities	582	365
Total current liabilities	9,060	5,203
Long term portion of operating lease liabilities	357
Total liabilities	9,417	5,203
Commitments
Stockholders' equity:
Preferred stock
Common stock, $0.001 par value per share, 150,000,000 shares authorized; 27,501,340 and 13,016,955 shares issued and outstanding at December 31, 2022 and December 31, 2021, respectively	28	13
Additional paid-in capital	632,512	481,709
Accumulated other comprehensive loss	(79)
Accumulated deficit	(507,643)	(455,809)
Total stockholders' equity	221,216	122,311
Total liabilities and stockholders' equity	230,633	127,514
Series X Redeemable Convertible Preferred Stock [Member]
Stockholders' equity:
Preferred stock	$ 96,398	$ 96,398