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Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2017
Fair Value Disclosures [Abstract]  
Fair Value, Assets Measured on Recurring Basis
The following table sets forth by level within the fair value hierarchy the Company's financial assets that were accounted for at fair value on a recurring basis as of September 30, 2017, and December 31, 2016 (in thousands).

 
 
September 30, 2017
 
December 31, 2016
 
 
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
Assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Marketable securities - available for sale
 
$
—

 
$
44,371.6

 
$
—

 
$
44,371.6

 
$
—

 
$
—

 
$
—

 
$
—

 
 
$
—

 
$
44,371.6

 
$
—

 
$
44,371.6

 
$
—

 
$
—

 
$
—

 
$
—