CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (UNAUDITED) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating expenses:
Research and development	[1]	$ 25,574	$ 30,131	$ 96,393	$ 159,295
Acquired in-process research and development	[2]	4,600	4,000	5,575	4,000
Selling, general and administrative		12,886	13,200	34,038	36,524
Total operating expenses		43,060	47,331	136,006	199,819
Loss from operations		(43,060)	(47,331)	(136,006)	(199,819)
Other income (expense):
Other income		3,620	2,244	11,017	3,076
Total other income		3,620	2,244	11,017	3,076
Net loss		(39,440)	(45,087)	(124,989)	(196,743)
Other comprehensive income (loss)
Unrealized gain on available-for-sale securities, net of tax		20	46	270	54
Comprehensive loss		$ (39,420)	$ (45,041)	$ (124,719)	$ (196,689)
Earnings Per Share, Basic		$ (0.36)	$ (0.42)	$ (1.14)	$ (1.82)
Earnings Per Share, Diluted		$ (0.36)	$ (0.42)	$ (1.14)	$ (1.82)
Weighted Average Number of Shares Outstanding, Basic		109,754,812	108,420,674	109,333,684	108,154,397
Weighted Average Number of Shares Outstanding, Diluted		109,754,812	108,420,674	109,333,684	108,154,397

[1] Includes related-party amounts of $1,448 and $6,666 for the three and nine months ended September 30, 2023, respectively, and $1,742 and $6,027 for the three and nine months ended September 30, 2022, respectively

[2] Includes related-party amounts of $4,600 and $4,975 for the three and nine months ended September 30, 2023, respectively, and $4,000 for both the three and nine months ended September 30, 2022 (see Note 15).