STOCK-BASED COMPENSATION - Options table (Details) - Stock options - 2012 Equity Incentive Plan - $ / shares			12 Months Ended
	Jan. 05, 2017	Jun. 24, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Number of options
Outstanding at the beginning of period					344,000
Granted (in shares)			525,000
Forfeited (in shares)		(343,662)			(344,000)
Outstanding at the end of period			525,000
Weighted Average Remaining Contractual Term (years)
Options granted, weighted average remaining contractual life				7 years
Options outstanding, weighted average remaining contractual life			6 years
Weighted Average Exercise Price
Outstanding at the beginning of period					$ 38.26
Granted (in dollars per share)				$ 4.69
Forfeited (in dollars per share)					38.26
Outstanding at the end of period	$ 4.69		$ 4.69
Weighted Average Fair Value
Outstanding at the beginning of period					18.22
Granted (in dollars per share)				$ 2.47
Forfeited (in dollars per share)					$ 18.22
Outstanding at the end of period			$ 2.47