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Fair value of financial assets and liabilities (Tables)
9 Months Ended
Sep. 30, 2021
Fair value of financial assets and liabilities  
Summary of assets that are measured at fair value on a recurring basis

September 30, 2021

 

Total

 

Level 1

Level 2

Level 3

Money market funds

    

$

139,039

$

139,039

$

$

Commercial paper

 

7,000

7,000

 

Corporate debt securities

 

43,146

43,146

 

$

189,185

$

139,039

$

50,146

$

December 31, 2020

 

Total

 

Level 1

Level 2

Level 3

Money market funds

    

$

158,023

    

$

158,023

$

$

Commercial paper

 

47,955

 

 

47,955

 

Corporate debt securities

 

33,190

 

 

33,190

 

$

239,168

$

158,023

$

81,145

$