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FAIR VALUE MEASUREMENTS (Tables)
12 Months Ended
Dec. 31, 2016
Fair Value Disclosures [Abstract]  
Financial Assets Measured at Fair Value on Recurring Basis
 
The Company's financial assets measured at fair value on a recurring basis, including interest receivable components consisted of the following types of instruments as of December 31, 2016 and 2015:

   
December 31, 2016
 
   
Fair value measurements using input type
 
   
Level 1
   
Level 2
   
Level 3
   
Total
 
Cash equivalents:
                       
Money market funds
 
$
578
   
$
-
   
$
-
   
$
578
 
                                 
Available-for-sale:
                               
                                 
Foreign banks and government debentures
   
-
     
54,100
     
-
     
54,100
 
Corporate debentures
   
-
     
41,319
     
-
     
41,319
 
                                 
Total financial assets
 
$
578
   
$
95,419
   
$
-
   
$
95,997
 
 
   
December 31, 2015
 
   
Fair value measurements using input type
 
   
Level 1
   
Level 2
   
Level 3
   
Total
 
Cash equivalents:
                       
Money market funds
 
$
853
   
$
-
   
$
-
   
$
853
 
                                 
Available-for-sale:
                               
                                 
Foreign banks and government debentures
   
-
     
50,596
     
-
     
50,596
 
Corporate debentures
   
-
     
47,523
     
-
     
47,523
 
Corporate shares
   
5,698
     
-
     
-
     
5,698
 
                                 
Total financial assets
 
$
6,551
   
$
98,119
   
$
-
   
$
104,670