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Short-term Investments (Tables)
 9 Months Ended
Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]  
Summary of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Short-term Investments The following table summarizes the amortized cost, gross unrealized gains and losses, and fair value of available-for-sale investments as of September 30, 2020:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Aggregate
Fair Value
U.S. government debt securities$85,001 $93 $— $85,094 
Certificates of deposit264 — — 264 
Total$85,265 $93 $— $85,358 
The following table summarizes the amortized cost, gross unrealized gains and losses, and fair value of available-for-sale investments as of December 31, 2019:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Aggregate
Fair Value
U.S. government debt securities$8,989 $7 $— $8,996 
Certificates of deposit264 — — 264 
Total$9,253 $7 $— $9,260