STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE Share-based Compensation Expense (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
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	$ 3,163	$ 1,999	$ 9,436	$ 5,109
Costs of product sales [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	687	223	1,884	651
Research and development [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	599	340	1,743	906
Selling, general and administrative [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	$ 1,877	$ 1,436	$ 5,809	$ 3,552