STOCK-BASED COMPENSATION - Schedule of Stock Option Activity (Details) - Stock Option - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Options
Balance at beginning of period, Options	6,837,006
Grants approved	1,436,500
Options exercised	(600)
Options forfeited and expired	(1,637,309)
Balance at end of period, Options	6,635,597	6,837,006
Weighted Average Exercise Price
Beginning Balance, Weighted Average Exercise Price (in dollars per share)	$ 7.65
Granted, Weighted Average Exercise Price (in dollars per share)	3.02
Exercised, Weighted Average Exercise Price (in dollars per share)	2.73
Forfeited and expired, Weighted Average Exercise Price (in dollars per share)	8.42
Ending Balance, Weighted Average Exercise Price (in dollars per share)	$ 6.46	$ 7.65
Aggregate Intrinsic Value	$ 2	$ 4,150
Weighted Average Remaining Contractual Term	5 years 9 months 26 days	7 years 4 months 24 days
Outstanding options less expected forfeitures, Options	6,335,391
Outstanding options less expected forfeitures, Weighted Average Exercise Price (in dollars per share)	$ 6.51
Outstanding options less expected forfeitures, Aggregate Intrinsic Value	$ 2
Outstanding options less expected forfeitures, Weighted Average Remaining Contractual Life	5 years 7 months 26 days
Options exercisable at end of period	4,384,108
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 7.05
Exercisable, Aggregate Intrinsic Value	$ 2
Exercisable, Weighted Average Remaining Contractual Life	4 years 2 months 13 days