Investments - Summary of Cash Equivalents and Short-Term Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investments
Amortized Cost	$ 239,606	$ 281,783
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(31)	0
Estimated Fair Value	239,575	281,783
Cash Equivalents \| Money market funds
Investments
Amortized Cost	188,734	281,783
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	188,734	$ 281,783
Cash Equivalents \| Certificates of deposit
Investments
Amortized Cost	400
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Estimated Fair Value	400
Short-term Investments \| U.S. treasury notes
Investments
Amortized Cost	50,472
Gross Unrealized Gains	0
Gross Unrealized Losses	(31)
Estimated Fair Value	$ 50,441

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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Amount, before tax, of unrealized loss 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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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amount of 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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