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Fair Value Measurements and Available for Sale Investments (Tables)
 9 Months Ended
Sep. 30, 2022
Fair Value Measurements And Available For Sale Investments [Abstract]  
Assets Measured at Fair Value on Recurring Basis
The following table presents the hierarchy for assets measured at fair value on a recurring basis as of September 30, 2022 and December 31, 2021 (in thousands):
Fair Value Measurements at End of Period Using:
Total
Fair Value		Quoted Market
Prices for
Identical Assets
(Level 1)		Significant
Other Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
As of September 30, 2022
Money market funds$81,850 $81,850 $— $— 
U.S. Treasury and agency securities58,883 58,883 — — 
Commercial paper119,603 — 119,603 — 
Corporate debt securities12,347 — 12,347 — 
As of December 31, 2021
Money market funds$139,794 $139,794 $— $— 
Commercial paper113,939 — 113,939 — 
Corporate debt securities37,873 — 37,873 — 
Schedule of Available for Sale Investments by Security Type
The aggregate market value, cost basis, and gross unrealized losses of available-for-sale investments by security type, classified in marketable securities and long-term investments as of September 30, 2022 and December 31, 2021 are as follows (in thousands):
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Total
Fair Value
As of September 30, 2022
U.S. Treasury and agency securities$41,494 $— $(79)$41,415 
 Corporate debt securities12,426 — (79)12,347 
     Commercial paper97,345 — (201)97,144 
Total marketable securities$151,265 $— $(359)$150,906 
As of December 31, 2021
     Corporate debt securities$37,921 $— $(48)$37,873 
     Commercial paper103,942 — — 103,942 
Total marketable securities$141,863 $— $(48)$141,815 
Schedule of Contractual Maturities of Available-for-sale Debt Securities
Contractual maturities of available-for-sale debt securities, as of September 30, 2022, were as follows (in thousands):
Estimated
 Fair Value
Less than one year$150,906 
Greater than one year— 
Total$150,906