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SHARE-BASED COMPENSATION (Details) (USD $)	3 Months Ended		6 Months Ended
SHARE-BASED COMPENSATION (Details) (USD $)	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
SHARE-BASED COMPENSATION
Share-based compensation expense	$ 5,904,000	$ 3,524,000	$ 11,961,000	$ 6,242,000
Research and development
SHARE-BASED COMPENSATION
Share-based compensation expense	944,000	739,000	1,879,000	1,465,000
Selling, general and administrative
SHARE-BASED COMPENSATION
Share-based compensation expense	4,960,000	2,785,000	10,082,000	4,777,000
Inventory
SHARE-BASED COMPENSATION
Total share-based compensation cost capitalized as part of cost of inventory	$ 187,000		$ 367,000

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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