STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE SHARE-BASED COMPENSATION EXPENSE (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	$ 3,224	$ 3,127	$ 7,287	$ 6,272
Costs of product sales [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	538	660	1,232	1,197
Research and development [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	408	637	923	1,144
Selling, general and administrative [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	$ 2,278	$ 1,830	$ 5,132	$ 3,931