PROPERTY AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property and Equipment
Total Property and Equipment	$ 33,158	$ 28,520
Less Accumulated Depreciation and Amortization	(19,966)	(17,059)
Property and Equipment, Net	13,192	11,461
Depreciation and amortization expense	3,095	2,998	$ 2,388
Laboratory Equipment
Property and Equipment
Total Property and Equipment	6,771	5,432
Manufacturing Equipment
Property and Equipment
Total Property and Equipment	4,312	4,178
Office Furniture and Equipment
Property and Equipment
Total Property and Equipment	3,677	3,088
Leasehold Improvements
Property and Equipment
Total Property and Equipment	17,115	15,371
Construction in Progress
Property and Equipment
Total Property and Equipment	$ 1,283	$ 451