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Fair Value of Financial Instruments (Tables)
 6 Months Ended
Jun. 30, 2017
Fair Value Disclosures [Abstract]  
Fair Value, Assets Measured on Recurring Basis
The following is a summary of fair value measurements at June 30, 2017 and December 31, 2016 (in thousands):

As of June 30, 2017:
 
Carrying Value
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 
 
 
 
 
 
Money market funds (1)
$
144,707

 
$
144,707

 
$
—

 
$
—

Purchase Price Adjustment Receivable (2)
745

 
—

 
—

 
745


As of December 31, 2016:
 
Carrying Value
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 
 
 
 
 
 
Money market funds (1)
$
20,088

 
$
20,088

 
$
—

 
$
—

___________________________
(1) Classified in cash and cash equivalents in the accompanying unaudited condensed consolidated balance sheets.
(2) Classified as other assets in the accompanying unaudited condensed consolidated balance sheet and as a component of other sales and revenues in the accompanying unaudited condensed consolidated statements of operations.