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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]
Available-for-sale securities, amortized cost	$ 106,606	$ 103,096
Available-for-sale securities, gross unrealized gains	121	257
Available-for-sale securities	106,727	103,353
U.S. Treasury Bills and Government Agency Obligations
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale securities, amortized cost	20,061	20,110
Available-for-sale securities, gross unrealized gains	92	166
Available-for-sale securities	20,153	20,276
U.S. Corporate Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale securities, amortized cost	19,064	11,505
Available-for-sale securities, gross unrealized gains	20	42
Available-for-sale securities	19,084	11,547
Foreign Corporate Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale securities, amortized cost	15,501	15,508
Available-for-sale securities, gross unrealized gains	9	49
Available-for-sale securities	15,510	15,557
U.S. Commercial Paper
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale securities, amortized cost	12,997	13,997
Available-for-sale securities	12,997	13,997
Foreign Commercial Paper
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale securities, amortized cost	38,983	41,976
Available-for-sale securities	$ 38,983	$ 41,976

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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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