PROPERTY AND EQUIPMENT (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 32,030,000	$ 31,096,000
Less - accumulated depreciation and amortization	(18,319,000)	(14,786,000)
Property, Plant and Equipment, Net, Total	13,711,000	16,310,000
Depreciation and write down of fixed assets	3,539,000	3,692,000	3,631,000
Impairment charges	0	0	10,000
Laboratory Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	14,858,000	14,502,000
Furniture And Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,074,000	1,818,000
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	15,070,000	14,447,000
Equipment Under Construction [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 28,000	$ 329,000