XML 26 R15.htm IDEA: XBRL DOCUMENT v3.7.0.1
Fair Value of Financial Instruments (Tables)
 3 Months Ended
Mar. 31, 2017
Fair Value Disclosures [Abstract]  
Financial Assets Measured at Fair Value on a Recurring Basis
Financial assets measured at fair value on a recurring basis were as follows (in thousands):
 
Fair Value Measurements at March 31, 2017
 
 
 
Quoted Prices in Active Markets for Identical Assets
 
Significant Other Observable Inputs
 
Significant Unobservable Inputs
 
Total
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 
 
 
 
 
 
Money market funds
$
31,442

 
$
31,442

 
$
—

 
$
—

U.S. Treasury securities
13,821

 
—

 
13,821

 
—

Government-sponsored enterprises
37,915

 
—

 
37,915

 
—

Corporate debt securities
155,827

 
—

 
155,827

 
—

Total assets measured at fair value(a)
$
239,005

 
$
31,442

 
$
207,563

 
$
—

(a) Total assets measured at fair value at March 31, 2017, includes approximately $31.4 million reported in cash and cash equivalents on the balance sheet.
 
Fair Value Measurements at December 31, 2016
 
 
 
Quoted Prices in Active Markets for Identical Assets
 
Significant Other Observable Inputs
 
Significant Unobservable Inputs
 
Total
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 
 
 
 
 
 
Money market funds
$
46,781

 
$
46,781

 
$
—

 
$
—

U.S. Treasury securities
8,826

 
—

 
8,826

 
—

Government-sponsored enterprises
29,759

 
—

 
29,759

 
—

Corporate debt securities
166,300

 
—

 
166,300

 
—

Total assets measured at fair value(a)
$
251,666

 
$
46,781

 
$
204,885

 
$
—

(a) Total assets measured at fair value at December 31, 2016, includes approximately $50.8 million reported in cash and cash equivalents on the balance sheet.