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Fair Value Measurement (Tables)
12 Months Ended
Dec. 31, 2017
Fair Value Disclosures [Abstract]  
Assets and liabilities that are measured at fair value on a recurring basis
The following tables set forth our assets that are measured at fair value on a recurring basis at December 31, 2017 and 2016:
 
 
December 31, 2017
(in thousands)
 
Total
 
Level 1
 
Level 2
 
Level 3
 
 
 
 
 
 
 
 
 
Cash equivalents
 
$
69,480

 
$
69,480

 
$

 
$


 
 
December 31, 2016
(in thousands)
 
Total
 
Level 1
 
Level 2
 
Level 3
 
 
 
 
 
 
 
 
 
Cash equivalents
 
$

 
$

 
$

 
$