INVENTORIES (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Inventories [Abstract]    
Raw materials $ 10,839 $ 11,461
Work-in-process 19,382 18,147
Finished goods 25,289 27,024
Total 55,510 56,632
Short-term portion 50,701 50,676
Long-term portion $ 4,809 $ 5,956