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Note 9 - Derivative Financial Instruments (Tables)
 12 Months Ended
Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Instruments [Table Text Block]
   
As of December 31,
 
Balance Sheet Location
 
2014
   
2013
 
Derivative assets:
               
Deposits and other current assets
 
$
-
   
$
109
 
Other assets, net
   
-
     
8
 
   
$
-
   
$
117
 
                 
Derivative liabilities:
               
Other current liabilities
 
$
(101
)
 
$
-
 
Other long-term liabilities
   
-
     
-
 
   
$
(101
)
 
$
-
 
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]
   
Years Ended December 31,
 
   
2014
   
2013
   
2012
 
Increase (decrease) in fair value of derivatives included in other comprehensive income (loss) (effective portion)
  $ (218 )     $ 109       $ 231  
Realized gain (loss) included in cost of revenues (effective portion)
    (137 )       48         (66 )
Increase (decrease) in fair value of derivatives included in cost of revenues (ineffective portion)
    -         -         -