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Investments - Summary of Amortized Cost and Fair Value of Available-for-Sale Investments by Contract Maturity (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Investments Debt And Equity Securities [Abstract]
Amortized Cost, Due in one year or less	$ 36,097,000
Amortized Cost, Due after one year through five years	38,640,000
Cost Basis	74,737,000
Fair Value, Due in one year or less	36,081,000
Fair Value, Due after one year through five years	38,576,000
Fair Value, Total	$ 74,657,000	$ 0
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