Available-for-Sale Securities - Summary of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-Sale [Line Items]
Available for sale securities, Amortized Cost	$ 636,038	$ 722,122
Available for sale securities, Unrealized Gains	45	0
Available for sale securities, Unrealized (Losses)	(3,889)	(220)
Available for sale securities, Estimated Fair Value	632,194	721,902
US Treasury Bill Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Available for sale securities, Amortized Cost	101,202
Available for sale securities, Unrealized Gains	0
Available for sale securities, Unrealized (Losses)	(246)
Available for sale securities, Estimated Fair Value	100,956
Corporate Debt Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Available for sale securities, Amortized Cost	64,089	10,037
Available for sale securities, Unrealized Gains	2	0
Available for sale securities, Unrealized (Losses)	(729)	(31)
Available for sale securities, Estimated Fair Value	63,362	10,006
U.S. Government Agency Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Available for sale securities, Amortized Cost	49,891	4,862
Available for sale securities, Unrealized Gains	4	0
Available for sale securities, Unrealized (Losses)	(771)	(19)
Available for sale securities, Estimated Fair Value	49,124	4,843
Money Market Funds [Member]
Debt Securities, Available-for-Sale [Line Items]
Available for sale securities, Amortized Cost	224,325	671,845
Available for sale securities, Unrealized Gains	0	0
Available for sale securities, Unrealized (Losses)	0
Available for sale securities, Estimated Fair Value	224,325	671,845
Certificates of Deposits [Member]
Debt Securities, Available-for-Sale [Line Items]
Available for sale securities, Amortized Cost	1,959	245
Available for sale securities, Unrealized Gains	0	0
Available for sale securities, Unrealized (Losses)	(17)	(1)
Available for sale securities, Estimated Fair Value	1,942	244
U.S. Government Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Available for sale securities, Amortized Cost	194,572	35,133
Available for sale securities, Unrealized Gains	39	0
Available for sale securities, Unrealized (Losses)	(2,126)	(169)
Available for sale securities, Estimated Fair Value	$ 192,485	$ 34,964

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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