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SHARE-BASED PAYMENTS - Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options (in shares)	2,680,463		2,045,143	2,122,897
Outstanding options, weighted average exercise price (in dollars per share)	$ 4.67		$ 5.69	$ 6.54
Number of grants in period, net of forfeitures (in shares)	732,328		449,537
Share-based compensation	$ 1,041,000	$ 667,000
Number of exercises in period (in shares)	0		8,369
Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)	4,504,598
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	2 years
Award exercise period	5 years
Exercisable options, weighted average remaining contractual term	3 years 9 months 22 days
Number of grants in period (in shares)	730,000	420,000
Number of options (in shares)	2,680,000
Number of exercisable options (in shares)	2,210,000
Outstanding options, weighted average exercise price (in dollars per share)	$ 4.67
Exercisable options, weighted average exercise price (in dollars per share)	$ 5.16
Options, vested and expected to Vest, aggregate intrinsic value	$ 0
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of grants in period, net of forfeitures (in shares)	1,130,000	950,000
Grants in period, grant date intrinsic value (in dollars per share)	$ 1,640,620.00	$ 302,170.00
Unrecognized compensation costs related to unvested stock options	$ 410,000
Unrecognized compensation costs related to RSU awards	$ 3,100,000
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding options, weighted average exercise price (in dollars per share)	$ 15.61		$ 15.61	$ 32.10
Maximum | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable options, weighted average remaining contractual term	10 years

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