Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 99,901	$ 70,992
Marketable securities	546,892	682,192
Prepaid expenses and other current assets	28,743	31,825
Collaboration receivable - related party	9,943	83,009
Restricted cash	$ 1,332	$ 1,332
Accounts Receivable, after Allowance for Credit Loss, Current, Related Party [Extensible Enumeration]	Related Party [Member]	Related Party [Member]
Total current assets	$ 686,811	$ 869,350
Property and equipment, net	1,274	1,921
Right-of-use operating asset	1,220	4,458
Other long-term assets	7,800	6,548
Total assets	697,105	882,277
Current liabilities:
Accounts payable	8,650	10,318
Accrued expenses	58,982	67,264
Operating lease liability, current portion	1,411	5,165
Total current liabilities	69,043	82,747
Total liabilities	69,043	82,747
Commitments and contingencies (Note 6)
Stockholders’ equity:
Preferred stock, $0.0001 par value per share; 5,000,000 shares authorized at June 30, 2024 and December 31, 2023; no shares issued or outstanding at June 30, 2024 and December 31, 2023
Common stock, $0.0001 par value per share; 120,000,000 shares authorized at June 30, 2024 and December 31, 2023; 60,897,967 and 60,046,676 shares issued at June 30, 2024 and December 31, 2023; 60,894,934 and 60,043,643 shares outstanding at June 30, 2024 and December 31, 2023	6	6
Treasury stock, at cost, 3,033 shares at June 30, 2024 and December 31, 2023	(400)	(400)
Additional paid-in capital	3,410,143	3,370,397
Accumulated deficit	(2,780,996)	(2,569,659)
Accumulated other comprehensive loss	(691)	(814)
Total stockholders’ equity	628,062	799,530
Total liabilities and stockholders’ equity	$ 697,105	$ 882,277