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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2015
Fair Value Disclosures [Abstract]  
Schedule of assets and liabilities measured at fair value on recurring basis
The following tables present financial assets and liabilities at March 31, 2015 and December 31, 2014 for which the Company measures fair value on a recurring basis, by level, within the fair value hierarchy:
March 31, 2015
Total
 
Level 1
 
Level 2
 
Level 3
 
Valuation
Technique
Assets
 
 
 
 
 
 
 
 
 
Money market mutual funds
$
14,997

 
$
14,997

 
$

 
$

 
(a)
Government agency bonds
4

 
4

 

 

 
(a)
United States treasuries
3,005

 
3,005

 

 

 
(a)
Corporate notes
3,608

 
3,608

 

 

 
(a)
Certificates of deposit
5,155

 
5,155

 

 

 
(a)
Municipal bonds
775

 

 
775

 

 
(b)
Liabilities
 
 
 
 
 
 
 
 
 
Interest rate swaps
308

 

 
308

 

 
(c)
 
December 31, 2014
Total
 
Level 1
 
Level 2
 
Level 3
 
Valuation
Technique
Assets
 
 
 
 
 
 
 
 
 
Money market mutual funds
$
6,824

 
$
6,824

 
$

 
$

 
(a)
Government agency bonds
3,502

 
3,502

 

 

 
(a)
United States treasuries
4,006

 
4,006

 

 

 
(a)
Corporate notes
4,667

 
4,667

 

 

 
(a)
Certificates of deposit
4,155

 
4,155

 

 

 
(a)
Municipal bonds
1,359

 

 
1,359

 

 
(b)
Liabilities
 
 
 
 
 
 
 
 
 
Interest rate swaps
295

 

 
295

 

 
(c)