Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 86,877	$ 32,109
Marketable securities	267,611	264,316
Receivable from contracts with collaborators	3,629	0
Prepaid expenses and other current assets	12,786	10,094
Total current assets	370,903	306,519
Property and equipment, net	824	1,648
Operating lease right-of-use assets	1,662	3,131
Other assets	59	618
Total assets	373,448	311,916
Current liabilities
Accounts payable	1,000	5,526
Accrued research and development expenses	10,861	7,779
Current portion of long-term debt	0	11,613
Current contract liabilities	17,013	0
Accrued expenses and other current liabilities	16,311	26,680
Total current liabilities	45,185	51,598
Long-term convertible senior notes	197,051	196,591
Long-term debt	0	814
Operating lease liabilities - long-term	0	144
Long-term contract liabilities	49,683	0
Total liabilities	291,919	249,147
Commitments and contingencies (Note 9)
Stockholders' equity
Common stock, $0.0001 par value; 700,000,000 shares authorized as of June 30, 2024 and December 31, 2023; 226,227,259 shares issued and outstanding as of June 30, 2024, and 225,409,315 shares issued and outstanding as of December 31, 2023	23	23
Additional paid-in capital	1,286,760	1,275,136
Accumulated deficit	(1,204,736)	(1,212,040)
Accumulated other comprehensive loss	(518)	(350)
Total stockholders' equity	81,529	62,769
Total liabilities and stockholders' equity	$ 373,448	$ 311,916