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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2021
Fair Value Disclosures [Abstract]  
Schedule of Assets Measured on Recurring Basis The following table presents information about our assets that are measured at fair value on a recurring basis using the above input categories (in thousands):
Fair Value Measurements as of September 30, 2021Fair Value Measurements as of December 31, 2020
Description
Total
Level 1
Level 2
Total
Level 1
Level 2
Money market funds$253,079 $253,079 $— $265,578 $265,578 $— 
Commercial paper12,487 — 12,487 21,489 — 21,489 
U.S. treasury debt securities52,731 — 52,731 51,809 — 51,809 
Corporate debt securities160,968 — 160,968 147,882 — 147,882 
Foreign government debt securities5,038 — 5,038 1,027 — 1,027 
$484,303 $253,079 $231,224 $487,785 $265,578 $222,207 
Included in cash and cash equivalents$253,079 $280,578 
Included in marketable securities$231,224 $207,207