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Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2016
Fair Value Disclosures [Abstract]  
Schedule of assets measured at fair value on a recurring basis

 

    Fair Value Measurement at June 30, 2016 Using:  
    Quoted Prices in
Active Markets for
Identical Assets		     Significant Other
Observable Inputs		     Significant
Unobservable
Inputs		  
    (Level 1)     (Level 2)     (Level 3)  
Corporate debt securities   $ 858     $ -     $ -  
Money market funds (included in cash and cash equivalents)     43,309                  
Total   $ 44,167     $ -     $ -  

 

    Fair Value Measurement at December 31, 2015 Using:  
    Quoted Prices in
Active Markets for
Identical Assets		     Significant Other
Observable Inputs		     Significant
Unobservable
Inputs		  
    (Level 1)     (Level 2)     (Level 3)  
Corporate debt securities   $ 869     $ -     $ -  
Money market funds (included in cash and cash equivalents)     43,027                  
Total   $ 43,896     $ -     $ -