Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 202,301	$ 20,525
Short-term investments	11,027	205,912
Prepaid expenses and other current assets	2,117	1,253
Total current assets	215,445	227,690
Right-of-use asset	806	948
Other assets	1,989	1,995
Total assets	218,240	230,633
Current liabilities:
Accounts payable	930	788
Accrued expenses	5,156	7,690
Current portion of operating lease liabilities	587	582
Total current liabilities	6,673	9,060
Long term portion of operating lease liabilities	207	357
Total liabilities	6,880	9,417
Commitments
Stockholders' equity:
Common stock, $0.001 par value per share, 150,000,000 shares authorized; 27,986,718 and 27,501,340 shares issued and outstanding at March 31, 2023 and December 31, 2022, respectively	28	28
Additional paid-in capital	634,843	632,512
Accumulated other comprehensive loss	(4)	(79)
Accumulated deficit	(518,831)	(507,643)
Total stockholders' equity	211,360	221,216
Total liabilities and stockholders' equity	218,240	230,633
Preferred stock
Stockholders' equity:
Preferred stock
Series X redeemable convertible preferred stock
Stockholders' equity:
Preferred stock	$ 95,324	$ 96,398