Organization - Additional Information (Details) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended		12 Months Ended
	Feb. 28, 2021 USD ($) $ / shares shares	Jan. 31, 2021	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 shares	Dec. 31, 2018 shares
Description Of Organization [Line Items]
Reverse stock split, description			In January 2021, the Company’s board of directors approved an amendment to the Company’s amended and restated certificate of incorporation to effect a 1-for-4 reverse stock split of shares of the Company’s common and convertible preferred stock, which was effected on January 27, 2021.
Reverse stock split, conversion ratio		0.25
Proceeds from public offering of common stock, net of offering costs			$ 626,405
Convertible preferred stock, shares outstanding | shares			0	134,113
Accumulated deficit			$ 785,360	$ 429,432
Cash, cash equivalents and marketable securities			746,900
Success payment liabilities			100,100
Contingent consideration			$ 102,500
Convertible Preferred Stock
Description Of Organization [Line Items]
Convertible preferred stock, shares outstanding | shares				134,113	106,890	11,463
Common Stock
Description Of Organization [Line Items]
Conversion of preferred stock into common stock (in shares) | shares			134,113
IPO
Description Of Organization [Line Items]
Convertible preferred stock, shares outstanding | shares	134,100
IPO | Convertible Preferred Stock
Description Of Organization [Line Items]
Conversion of preferred stock into common stock (in shares) | shares	134,100
Carrying value of converted preferred stock	$ 852,900
IPO | Common Stock
Description Of Organization [Line Items]
Issuance of common stock in initial public offering, net of offering costs (in shares) | shares	27,000		27,025
Common stock price per share | $ / shares	$ 25.00
Proceeds from public offering of common stock, net of offering costs	$ 626,400
Payments of underwriting discounts and commissions	45,200
Offering expenses	$ 4,000
Underwriters' Option To Purchase Additional Shares | Common Stock
Description Of Organization [Line Items]
Issuance of common stock in initial public offering, net of offering costs (in shares) | shares	3,500