Short-Term Investments - Summary of Maturities of Short-Term Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 71,782	$ 39,942
Estimated Fair Value	71,783	$ 39,983
Due in One Year or Less
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	57,185
Estimated Fair Value	57,182
Due After One Year Through Two Years
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	14,597
Estimated Fair Value	$ 14,601