STOCK-BASED COMPENSATION (Stock Option Award Activity) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Number of Options outstanding
Outstanding at the beginning of the year (in shares)	801,690	565,050
Granted (in shares)	488,300	346,500
Exercised (in shares)	(32,928)
Forfeited (in shares)	(174,572)	(109,860)
Outstanding at the end of the reporting period (in shares)	1,082,490	801,690	565,050
Number of Options Exercisable
Exercisable at the beginning of the year (in shares)	419,174	302,415
Vested (in shares)	(457,338)	(173,010)
Forfeited (in shares)	(139,281)	(56,251)
Exercisable at the end of the reporting period (in shares)	704,303	419,174	302,415
Weighted Average Exercise Price Outstanding
Outstanding at the beginning of period (in dollars per share)	$ 5.25	$ 6.57
Granted (in dollars per share)	4.62	3.03
Exercised (in dollars per share)	2.37
Forfeited (in dollars per share)	6.40	5.08
Outstanding at the end of the reporting period (in dollars per share)	4.87	5.25	$ 6.57
Weighted Average Exercise Price Exercisable
Exercisable at the beginning of the reporting period (in dollars per share)	5.94	6.25
Vested exercisable (in dollars per share)	4.57	5.37
Canceled/Forfeited	6.65	5.87
Exercisable at the end of the reporting period (in dollars per share)	5.08	5.94	6.25
Weighted Average Grant Date Fair Value Outstanding
Outstanding at the beginning of the reporting period (in dollars per share)	3.32	4.25
Options granted (in dollars per share)	$ 2.79	1.81
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 1.41
Forfeited (in dollars per share)	$ 4.18	3.32
Outstanding at the end of the reporting period (in dollars per share)	3.00	3.32	4.25
Weighted Average Grant Date Fair Value Exercisable
Exercisable at the beginning of the reporting period (in dollars per share)	3.86	4.11
Vested options exercisable (in dollars per share)	2.77	3.43
Forfeited options exercisable (in dollars per share)	4.38	3.87
Exercisable at the end of the reporting period (in dollars per share)	$ 3.17	$ 3.86	$ 4.11
Weighted Average Remaining Life In Years Outstanding
Outstanding at the end of the reporting period (in years)	8 years 4 months 17 days	7 years 4 months 24 days	7 years 10 months 2 days
Granted, Weighted average remaining life (in years)	9 years 6 months 4 days	8 years 6 months 4 days
Weighted Average Remaining Life Exercisable
Exercisable at the end of the reporting period (in years)	8 years 1 month 24 days	6 years	7 years 26 days
Vested, Weighted average remaining live (in years)	8 years 7 months 24 days	5 years 11 months 12 days
Non-vested restricted stock unit awards
Number of Options outstanding
Granted (in shares)	488,300	346,500
Outstanding at the end of the reporting period (in shares)	1,082,490
Number of Options Exercisable
Exercisable at the end of the reporting period (in shares)	704,303
Weighted Average Remaining Life Exercisable
Exercisable at the end of the reporting period (in years)	8 years 1 month 24 days