Short-Term Investments - Summary of Short-Term Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 57,659	$ 71,782
Unrealized Gains	8	5
Unrealized Losses	(1)	(4)
Estimated Fair Value	57,666	71,783
Commercial Paper
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	33,877	27,136
Unrealized Gains	5
Estimated Fair Value	33,882	27,136
Corporate Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	6,683	26,510
Unrealized Losses	(1)	(4)
Estimated Fair Value	6,682	26,506
U.S. Government and Agency Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	17,099	18,136
Unrealized Gains	3	5
Estimated Fair Value	$ 17,102	$ 18,141

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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