STRATEGIC ALLIANCES AND RESEARCH CONTRACTS - Revenue Earned Contract (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Revenue Earned Contract [Line Items]
Revenues	$ 160	$ 193	$ 127	$ 405	$ 3,529	$ 252	$ 129	$ 2,131	$ 885	$ 6,041
Hearing Program
Revenue Earned Contract [Line Items]
Revenues									424	5,529
Foot and Mouth Disease Program
Revenue Earned Contract [Line Items]
Revenues									180	404
Malaria Program
Revenue Earned Contract [Line Items]
Revenues									131	$ 108
Other strategic collaborations and research grants
Revenue Earned Contract [Line Items]
Revenues									$ 150