INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended			9 Months Ended
	Mar. 31, 2017	May 31, 2016	Sep. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
INTANGIBLE ASSETS
Milestone payments payable contingent on the satisfaction of certain commercialization, intellectual property, and net sales milestones		$ 21,000
Milestone payment contingent on the first commercial sale of the product in the U.S.		4,000
Upfront payment classified as an intangible asset		2,500
Maximum reimbursement amount for out-of-pocket expenses		$ 2,000
Out-Of-Pocket Expenses Reimbursed						$ 1,391
Remaining amortization period	11 years 2 months 12 days			3 years 8 months 12 days		9 years 9 months 18 days
Amortization expense			$ 48		$ 227	$ 225	$ 227
Estimated amortization for 2017			47			47
Estimated amortization for 2018			191			191
Estimated amortization for 2019			191			191
Estimated amortization for 2020			191			191
Estimated amortization for 2021			191			191
Estimated amortization thereafter			$ 1,066			$ 1,066