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Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2014
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
The following table details the fair value hierarchy of the Company's financial assets measured at fair value on a recurring basis as of December 31, 2014:
 
 
 
 
Fair Value Measurements Using:
Cash Equivalents:
 
Fair Value
 
Quoted Prices
in Active
Markets for
Identical Assets
(Level 1)
 
Significant Other
Observable Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
Money market funds
 
$
17,865

 
$
17,865

 
$
—

 
$
—

Certificates of deposit
 
1,456

 
—

 
1,456

 
—

 
 
$
19,321

 
$
17,865

 
$
1,456

 
$
—

 
 
 
 
 
 
 
 
 
Investments:
 
Fair Value
 
Quoted Prices
in Active
Markets for
Identical Assets
(Level 1)
 
Significant Other
Observable Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
U.S. government agency bonds
 
$
7,502

 
$
—

 
$
7,502

 
$
—

Corporate bonds and commercial paper
 
6,192

 
—

 
6,192

 
—

Certificates of deposit
 
7,262

 
—

 
7,262

 
—

 
 
$
20,956

 
$
—

 
$
20,956

 
$
—