Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 172,012	$ 175,530
Short-term investments	197,895	71,000
Prepaid expenses and other current assets	4,614	4,412
Total current assets	374,521	250,942
Right-of-use asset	210	363
Other assets	4,076	3,361
Total assets	378,807	254,666
Current liabilities:
Accounts payable	862	1,513
Accrued expenses	10,042	9,708
Current portion of operating lease liabilities	168	329
Total current liabilities	11,072	11,550
Total liabilities	11,072	11,550
Commitments (Note 6)
Stockholders' equity:
Common stock, $0.001 par value per share, 150,000,000 shares authorized; 54,903,061 and 41,034,797 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively	55	41
Additional paid-in capital	872,832	728,285
Accumulated other comprehensive loss	(14)
Accumulated deficit	(600,462)	(580,534)
Total stockholders' equity	367,735	243,116
Total liabilities and stockholders' equity	378,807	254,666
Preferred stock
Stockholders' equity:
Preferred stock
Series X redeemable convertible preferred stock
Stockholders' equity:
Preferred stock	$ 95,324	$ 95,324