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Financial Instruments (Tables)
 9 Months Ended
Sep. 30, 2017
Financial Instruments  
Summary of assets measured at fair value on a recurring basis

 

Below is a summary of assets measured at fair value on a recurring basis (in thousands):

 

 

As of September 30, 2017

 

 

 

Quoted Prices
in Active
Markets
(Level 1)

 

Significant

Observable

Inputs
(Level 2)

 

Significant

Unobservable

Inputs
(Level 3)

 

Total

 

 

 

 

 

 

 

 

 

 

 

Assets:

 

 

 

 

 

 

 

 

 

Cash and cash equivalents:

 

 

 

 

 

 

 

 

 

Money market funds

 

$
11,866

 

$

—

 

$

—

 

$
11,866

 

Corporate debt securities

 

—

 
2,655

 

—

 
2,655

 

U.S. reverse repurchase agreements

 

—

 
5,000

 

—

 
5,000

 

 

 

 

 

 

 

 

 

 

 

Total assets

 

$
11,866

 

$
7,655

 

$

—

 

$
19,521

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

As of December 31, 2016

 

 

 

Quoted Prices
in Active
Markets
(Level 1)

 

Significant

Observable

Inputs
(Level 2)

 

Significant

Unobservable

Inputs
(Level 3)

 

Total

 

 

 

 

 

 

 

 

 

 

 

Assets:

 

 

 

 

 

 

 

 

 

Cash and cash equivalents:

 

 

 

 

 

 

 

 

 

Money market funds

 

$
22,423

 

$

—

 

$

—

 

$
22,423

 

Available-for-sale securities:

 

 

 

 

 

 

 

 

 

Corporate debt securities

 

—

 
13,930

 

—

 
13,930

 

U.S. government-sponsored securities

 

—

 
1,001

 

—

 
1,001

 

 

 

 

 

 

 

 

 

 

 

Total assets

 

$
22,423

 

$
14,931

 

$

—

 

$
37,354