ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
ACCOUNTS PAYABLE AND ACCRUED EXPENSES
Accounts payable	$ 6,821	$ 4,143
Accrued milestones and supervision payments	5,368	105,895
Accrued operating expenses	16,990	20,608
Accrued administrative expenses	2,767	691
Accrued interest	2,045	1,911
Total	33,991	$ 133,248
Milestone and supervision installments payments during the period	$ 101,100