Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 81,021	$ 70,992
Marketable securities	423,397	682,192
Prepaid expenses and other current assets	17,749	31,825
Collaboration receivable - related party	$ 9,134	$ 83,009
Accounts Receivable, after Allowance for Credit Loss, Current, Related Party [Extensible Enumeration]	Related Party [Member]	Related Party [Member]
Restricted cash	$ 0	$ 1,332
Total current assets	531,301	869,350
Property and equipment, net	890	1,921
Restricted cash	1,450	0
Right-of-use operating asset	10,753	4,458
Other long-term assets	2,828	6,548
Total assets	547,222	882,277
Current liabilities:
Accounts payable	12,699	10,318
Accrued expenses	57,598	67,264
Operating lease liability, current portion	1,318	5,165
Total current liabilities	71,615	82,747
Operating lease liability, net of current portion	10,518	0
Total liabilities	82,133	82,747
Commitments and contingencies (Note 6)
Stockholders’ equity:
Preferred stock, $0.0001 par value per share; 5,000,000 shares authorized at December 31, 2024 and 2023; no shares issued or outstanding at December 31, 2024 and 2023
Common stock, $0.0001 par value per share; 120,000,000 shares authorized at December 31, 2024 and 2023; 61,359,242 and 60,046,676 shares issued at December 31, 2024 and 2023, respectively; 61,356,209 and 60,043,643 shares outstanding at December 31, 2024 and 2023, respectively	6	6
Treasury stock, at cost, 3,033 shares at December 31, 2024 and 2023	(400)	(400)
Additional paid-in capital	3,435,564	3,370,397
Accumulated deficit	(2,970,325)	(2,569,659)
Accumulated other comprehensive income (loss)	244	(814)
Total stockholders’ equity	465,089	799,530
Total liabilities and stockholders’ equity	$ 547,222	$ 882,277