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DISCONTINUED OPERATIONS (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Reclassification of operating results from continuing operations to loss from discontinued operations        
Income tax on discontinued operations $ (2) $ (8) $ (10) $ (28)
Net income from discontinued operations 4 12 19 42
ALIGN products
       
Reclassification of operating results from continuing operations to loss from discontinued operations        
Interest income 6 20 29 70
Income tax on discontinued operations (2) (8) (10) (28)
Net income from discontinued operations $ 4 $ 12 $ 19 $ 42