SHARE-BASED COMPENSATION (Schedule of Stock Option Activity) (Details) - USD ($)		3 Months Ended	12 Months Ended
		Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Number of Options
Beginning balance		2,527,427	2,043,857
Granted		1,000,000	998,614	762,500	1,274,607
Exercised		(400)	(4,250)
Forfeited		(6,666)	(247,257)
Expired or cancelled		(102,500)	(263,537)
Ending balance		3,417,861	2,527,427	2,043,857
Vested at March 31, 2016		1,279,249
Weighted Average Exercise Price
Beginning balance		$ 12.98	$ 14.87
Granted		7.18	9.33
Exercised		0.45	0.57
Forfeited		13.26	14.42
Expired or cancelled		13.59	12.67
Ending balance		11.27	$ 12.98	$ 14.87
Vested at March 31, 2016		$ 15.42
Weighted Average Remaining Contractual Term
Weighted average remaining contractual term outstanding		3 years 4 months 2 days	3 years 7 months 10 days	3 years 9 months 18 days
Vested at March 31, 2016		2 years 4 months 10 days
Aggregate Intrinsic Value
Beginning balance	[1]
Ending balance	[1]
Vested at March 31, 2016	[1]
Exercisable at March 31, 2016 and expected to vest	[1]

[1] The aggregate intrinsic value is the amount by which the market value for the Company's common stock exceeds the weighted average exercise price of the outstanding stock options on the measurement date.