CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating expenses:
Research and development	$ 71,385	$ 40,159	$ 198,947	$ 114,014
General and administrative	23,680	14,368	61,654	41,594
Total operating expenses	95,065	54,527	260,601	155,608
Loss from operations	(95,065)	(54,527)	(260,601)	(155,608)
Interest income (expense), net	2,706	13	3,668	38
Other income (expense), net	(7,579)	(7,545)	(1,770)	(10,709)
Loss before income taxes	(99,938)	(62,059)	(258,703)	(166,279)
Net loss	$ (99,938)	$ (62,059)	$ (258,703)	$ (166,279)
Net loss per share, basic	$ (0.66)	$ (0.43)	$ (1.73)	$ (1.25)
Net loss per share, diluted	$ (0.66)	$ (0.43)	$ (1.73)	$ (1.25)
Weighted-average shares used in calculating net loss per share, basic	152,304,645	144,022,109	149,544,252	132,971,450
Weighted-average shares used in calculating net loss per share, diluted	152,304,645	144,022,109	149,544,252	132,971,450
Comprehensive loss:
Net loss	$ (99,938)	$ (62,059)	$ (258,703)	$ (166,279)
Other comprehensive income (loss)
Changes in fair value attributable to instrument-specific credit risk	(1,364)	(533)	9,466	(533)
Unrealized gains (losses) on securities available-for-sale	(1,430)		(3,286)
Total other comprehensive income (loss)	(2,794)	(533)	6,180	(533)
Comprehensive loss	$ (102,732)	$ (62,592)	$ (252,523)	$ (166,812)