PROPERTY AND EQUIPMENT, NET (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property and equipment
Total Property and Equipment	$ 21,965	$ 19,530
Less Accumulated Depreciation and Amortization	(11,992)	(12,325)
Property and Equipment, Net	9,973	7,205
Depreciation and amortization expense	1,932	2,047	2,248
Laboratory Equipment
Property and equipment
Total Property and Equipment	3,699	3,164
Manufacturing Equipment
Property and equipment
Total Property and Equipment	2,130	2,055
Office Furniture and Equipment
Property and equipment
Total Property and Equipment	1,386	1,264
Leasehold Improvements
Property and equipment
Total Property and Equipment	14,493	12,932
Construction in Progress
Property and equipment
Total Property and Equipment	$ 257	$ 115