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Fair Value of Financial Assets and Liabilities (Tables)
6 Months Ended
Jun. 30, 2020
Fair Value of Financial Assets and Liabilities  
Schedule of summary of the assets and liabilities measured at fair value on a recurring basis

The following tables summarize the assets and liabilities measured at fair value on a recurring basis at June 30, 2020 and December 31, 2019 (in thousands):

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​

​

​

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Fair Value Measurements at June 30, 2020

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Total

    

Level 1

    

Level 2

    

Level 3

Assets:

​

​

  

​

​

  

​

​

  

​

​

  

Money market funds, included in cash and cash equivalents

​

$

109,012

​

$

109,012

​

$

—

​

$

—

Marketable securities:

​

 

  

​

 

  

​

 

  

​

 

  

U.S. Treasury obligations

​

​

26,048

​

​

26,048

​

​

—

​

​

—

Total assets

​

$

135,060

​

$

135,060

​

$

—

​

$

—

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Fair Value Measurements at December 31, 2019

​

    

Total

    

Level 1

    

Level 2

    

Level 3

Assets:

​

​

  

​

​

  

​

​

  

​

​

  

Money market funds, included in cash and cash equivalents

​

$

34,896

​

$

34,896

​

$

—

​

$

—

Marketable securities:

​

 

  

​

 

  

​

 

  

​

 

  

U.S. Treasury obligations

​

 

121,140

​

 

121,140

​

 

—

​

 

—

Total assets

​

$

156,036

​

$

156,036

​

$

—

​

$

—