INDEBTEDNESS (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Contractual coupon	$ 1,078	$ 1,078	$ 2,156	$ 2,156
Amortization of debt discount	1,582	1,501	3,144	2,981
Amortization of finance fees	211	211	422	422
Capitalized interest	(54)	(6)	(100)	(15)
Interest Expense, Debt	$ 2,817	$ 2,784	$ 5,622	$ 5,544