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Fair Value of Financial Instruments
3 Months Ended
Mar. 31, 2020
Disclosure Text Block  
Fair Value of Financial Instruments

4. Fair Value of Financial Instruments

The following table summarizes cash equivalents and marketable securities measured at fair value on a recurring basis as of March 31, 2020 (in thousands):

    

    

Active

    

Observable

    

Unobservable

March 31, 

Markets

Inputs

Inputs

Description

2020

(Level 1)

(Level 2)

(Level 3)

Financial Assets

Cash equivalents:

Money market funds

$

341,711

$

341,711

$

$

U.S. treasury obligations

29,999

29,999

Investments, available-for-sale:

U.S. government agency securities 

100,996

100,996

U.S. treasury obligations

274,266

274,266

Total

$

746,972

$

645,976

$

100,996

$

The following table summarizes cash equivalents and marketable securities measured at fair value on a recurring basis as of December 31, 2019 (in thousands):

    

    

Active

    

Observable

    

Unobservable

December 31, 

Markets

Inputs

Inputs

Description

2019

(Level 1)

(Level 2)

(Level 3)

Financial Assets

Cash equivalents:

Money market funds

$

98,946

$

98,946

$

$

U.S. treasury obligations

14,992

14,992

Investments, available-for-sale:

U.S. government agency securities 

128,312

128,312

U.S. treasury obligations

305,710

305,710

Total

$

547,960

$

419,648

$

128,312

$