Organization and Summary of Significant Accounting Policies - Summary of Short-Term Investments (Details) $ in Thousands	Sep. 30, 2021 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 348,094
Unrealized Gains	33
Unrealized Losses	(9)
Estimated Fair Value	348,118
U.S. Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	51,248
Unrealized Gains	1
Unrealized Losses	(5)
Estimated Fair Value	51,244
Corporate Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	6,068
Unrealized Gains	0
Unrealized Losses	(4)
Estimated Fair Value	6,064
Commercial Paper
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	290,778
Unrealized Gains	32
Unrealized Losses	0
Estimated Fair Value	$ 290,810

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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