Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended				12 Months Ended
	Sep. 10, 2021	Jul. 31, 2021	Sep. 30, 2020	Oct. 31, 2019	Apr. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Apr. 26, 2019	Dec. 31, 2018
Stock price (in dollars per share)			$ 60
Stock issued (in dollars per share)		$ 113		$ 35	$ 19
Payment of offering expenses		$ 400	$ 300	$ 400	$ 600
Proceeds from issuance of common stock		$ 551,200	$ 271,000	$ 216,200	$ 108,100
Research and development						$ 264,208	$ 100,035	$ 51,357
Preferred stock, shares authorized						50,000,000
Preferred stock, shares issued						0
Preferred stock, shares outstanding						0
Common stock, shares authorized						750,000,000	750,000,000
Common stock, par value (in dollars per share)						$ 0.0001	$ 0.0001
Common stock, shares issued		5,175,000	4,791,665	5,714,286	5,263,158	95,140,000	86,223,000
Common stock, shares outstanding						95,140,000	86,223,000
In-process research and development acquisition
Asset acquisition, consideration transferred	$ 35,600
Issuance of common stock	276,346
Fair value of common stock issued	$ 30,900
Cash consideration	3,900
Net liabilities assumed	200
Acquisition related costs	600
Value of additional shares potentially issuable	$ 35,000
Number of additional shares potentially issuable	269,547
Option for additional shares
Common stock, shares issued				857,142					789,473
Common stock
Common stock, shares issued						95,140,000	86,223,000	78,005,000		62,083,000