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Short-term Investments (Tables)
 6 Months Ended
Jun. 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 June 30, 2020:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Aggregate
Fair Value
U.S. government debt securities$85,749  $279  $—  $86,028  
Certificates of deposit264  —  —  264  
Total$86,013  $279  $—  $86,292  
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