Short-Term Investments - Summary of Short-Term Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 65,000	$ 71,782
Unrealized Gains	5	5
Unrealized Losses	(5)	(4)
Estimated Fair Value	65,000	71,783
Commercial Paper
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	27,387	27,136
Estimated Fair Value	27,387	27,136
Corporate Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	16,472	26,510
Unrealized Losses	(5)	(4)
Estimated Fair Value	16,467	26,506
U.S. Government and Agency Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	21,141	18,136
Unrealized Gains	5	5
Estimated Fair Value	$ 21,146	$ 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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