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Fair Value Measurement (Tables)
9 Months Ended
Sep. 30, 2015
Fair Value Measurement [Abstract]  
Schedule of assets and liabilities measured at fair value on a recurring basis
     Fair Value Measurements at Reporting Date Using 
  September 30, 2015  Quoted Prices in Active Markets for Identical Assets/ Liabilities
(Level 1)
  Significant Other Observable Inputs
(Level 2)
  Significant Unobservable Inputs (Level 3) 
Assets:            
Cash equivalents:            
Money market funds $100  $100  $  $ 
Total assets at fair value on a recurring basis $100  $100  $  $ 
Liabilities:                
Other liabilities:                
Deferred payments $3,032  $  $  $3,032 
Total liabilities at fair value on a recurring basis $3,032  $  $  $3,032 

   

     Fair Value Measurements at Reporting Date Using 
  December 31, 2014  Quoted Prices in Active Markets for Identical Assets/ Liabilities
(Level 1)
  Significant Other Observable Inputs
(Level 2)
  Significant Unobservable Inputs
(Level 3)
 
Assets:            
Cash equivalents:            
Money market funds $8,275  $8,275  $  $ 
Interest rate swap  143      143    
Total assets at fair value on a recurring basis $8,418  $8,275  $143  $ 
Liabilities:                
Other liabilities:                
Deferred payments $2,398  $  $  $2,398 
Total liabilities at fair value on a recurring basis $2,398  $  $  $2,398
Schedule of changes in fair value of level 3 liability
  

Deferred

Payments

 
Balance at December 31, 2014 $2,398 
Amounts earned  (534)
Adjustments to fair value  1,168 
Transfers in or out of Level 3   
Balance at September 30, 2015 $3,032