Condensed Unaudited Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 467,572	$ 476,304
Available for sale securities	132,349	170,531
Prepaid expenses and other current assets	11,622	15,991
Total current assets	611,543	662,826
Property and equipment, net	1,109	946
Right-of-use asset, net	755	1,182
Other assets	0	1,869
Total assets	613,407	666,823
Current liabilities
Accrued research and development expenses	20,574	11,555
Accounts payable and accrued expenses	18,026	22,843
Lease liability	774	1,189
Total current liabilities	39,374	35,587
Lease liability, non-current	0	11
Debt, non-current	96,987	96,568
Total liabilities	136,361	132,166
Stockholders' equity
Preferred stock—$0.001 par value, 5,000,000 shares authorized, no shares issued or outstanding	0	0
Common stock—$0.001 par value, 200,000,000 shares authorized, 137,249,579 and 136,639,687 shares issued and outstanding at March 31, 2023 and December 31, 2022, respectively	137	137
Additional paid-in capital	1,414,043	1,399,555
Accumulated deficit	(937,035)	(864,806)
Accumulated other comprehensive income	(99)	(229)
Total stockholders' equity	477,046	534,657
Total liabilities and stockholders' equity	$ 613,407	$ 666,823