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FAIR VALUE MEASUREMENTS (Tables)
6 Months Ended
Jun. 30, 2014
Fair Value Disclosures [Abstract]  
Financial assets and liabilities measured at fair value on a recurring basis
As of June 30, 2014 and December 31, 2013, the assets and liabilities measured at fair value consisted of the following (in thousands):
 
June 30, 2014
 
December 31, 2013
 
Fair Value Measurements Using Input Types
 
 
 
Fair Value Measurements Using Input Types
 
 
 
Level 2
 
Level 3
 
Total
 
Level 2
 
Level 3
 
Total
Assets:
 
 
 
 
 
 
 
 
 
 
 
Derivative assets
$
7

 
$

 
$
7

 
$
185

 
$

 
$
185

Non-marketable securities

 
4,139

 
4,139

 

 
4,383

 
4,383

     Total assets
$
7

 
$
4,139

 
$
4,146

 
$
185

 
$
4,383

 
$
4,568

Liabilities:
 
 
 
 
 
 
 
 
 
 
 
Derivatives liabilities
$
318

 
$

 
$
318

 
$
938

 
$

 
$
938

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
The following table summarizes the change in the fair value of the Company's non-marketable securities during the six months ended June 30, 2014 (in thousands).
Balance as of December 31, 2013
$
4,383

Sales
(2,162
)
Realized gain (loss)
1,240

Unrealized gain (loss)
678

Balance as of June 30, 2014
$
4,139