PRODUCT WARRANTY (Schedule of Product Warranty) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
PRODUCT WARRANTY [Abstract]      
Balance at the beginning of the period $ 1,218 $ 466 $ 300
Warranty accrued 2,193 989 284
Utilized (226) (237) (118)
Balance at the end of the period 3,185 1,218 466
Current portion of product warranty    $ 153