XML 41 R25.htm IDEA: XBRL DOCUMENT v3.3.1.900
Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2015
Fair Value Disclosures [Abstract]  
Schedule of Assets and Liabilities Measured on Recurring Basis
The following table presents information about our assets that are measured at fair value on a recurring basis using the above input categories (in thousands):

 
 
Fair Value Measurements as of December 31, 2015
 
Fair Value Measurements as of December 31, 2014
Description
 
Total
 
Level 1
 
Level 2
 
Total
 
Level 1
 
Level 2
Money market funds
 
$
53,365

 
$
53,365

 
$
—

 
$
97,085

 
$
97,085

 
$
—

U.S. treasury debt securities
 
4,774

 
—

 
4,774

 
—

 
—

 
—

U.S. corporate debt securities
 
12,646

 
—

 
12,646

 
—

 
—

 
—

 
 
$
70,785

 
$
53,365

 
$
17,420

 
$
97,085

 
$
97,085

 
$
—

 
 
 
 
 
 
 
 
 
 
 
 
 
Included in cash and cash equivalents
 
$
53,365

 


 


 
$
97,085

 


 


Included in marketable securities
 
$
17,420

 


 


 
$
—

 
 
 
 
Schedule of Fair Value, Liabilities Level 3 Roll Forward
The following table represents a rollforward of the fair value of Level 3 instruments (significant unobservable inputs):
 
As of December 31,
 
2015
 
2014
Liabilities
 
 
 
Balance at beginning of period
$
—

 
$
—

Convertible notes - embedded derivative
—

 
1,199

Change in fair value of derivative
—

 
193

Share settlement of convertible debt
—

 
(1,392
)
Balance at end of period
$
—

 
$
—