SHAREHOLDERS' EQUITY (DEFICIT) - OPTIONS ROLLFORWARD (Details) - Amended and Restated 2009 Stock Incentive Plan - Stock options, employees and directors - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Number of options
Options outstanding at beginning of period (in shares)	1,247,185
Options granted (in shares)	456,870
Options expired (in shares)	(14,500)
Options outstanding at end of period (in shares)	1,689,555	1,247,185
Options vested and expected to be vested at end of period (in shares)	1,672,623
Options vested at end of period (in shares)	945,260
Weighted average exercise price per share
Options outstanding at beginning of period (in dollars per share)	$ 4.39
Options granted (in dollars per share)	2.94
Options expired (in dollars per share)	3.18
Options outstanding at end of period (in dollars per share)	4.02	$ 4.39
Options vested and expected to be vested at end of period (in dollars per share)	4.03
Options vested at end of period (in dollars per share)	$ 4.20
Weighted average remaining contractual life
Weighted average remaining contractual life, Outstanding (in years)	6 years 22 days	5 years 9 months 11 days
Weighted average remaining contractual life, Vested and expected to be vested (in years)	6 years 11 days
Weighted average remaining contractual life, Vested (in years)	4 years 3 months 7 days
Aggregate intrinsic value
Aggregate intrinsic value, Outstanding at the beginning of the period	$ 8,990
Aggregate intrinsic value, Outstanding at the end of the period		$ 8,990