STOCK BASED COMPENSATION -Schedule of Stock Option Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Shares
Outstanding, beginning (in shares)	3,180,417	3,206,916
Options granted (in shares)	697,000	500,000
Options exercised (in shares)	(7,500)	0
Options cancelled/forfeited/expired (in shares)	(409,167)	(526,499)
Outstanding, ending (in shares)	3,460,750	3,180,417	3,206,916
Vested (in shares)	2,127,500	1,959,167
Exercisable (in shares)	2,127,500	1,959,167
Weighted Average Exercise Price
Outstanding, beginning - weighted average exercise price (in dollars per share)	$ 2.21	$ 4.33
Options granted - weighted average exercise price (in dollars per share)	1.17	1.01
Options exercised - weighted average exercise price (in dollars per share)	1.20	0.00
Options cancelled/forfeited/expired - weighted average exercise price (in dollars per share)	(1.80)	(14.00)
Outstanding, ending - weighted average exercise price (in dollars per share)	2.05	2.21	$ 4.33
Vested - weighted average exercise price (in dollars per share)	2.48	2.55
Exercisable - weighted average exercise price (in dollars per share)	$ 2.48	$ 2.55
Weighted Average Remaining Contractual Life (in Years)
Outstanding - weighted average remaining contractual life	3 years 6 months	4 years 7 months 13 days	5 years 9 months 18 days
Options granted - weighted average remaining contractual life	8 years 1 month 6 days	8 years 1 month 13 days
Vested - weighted average remaining contractual life	4 years 8 months 1 day	4 years 5 months 12 days
Exercisable - weighted average remaining contractual life	4 years 8 months 1 day	4 years 5 months 12 days
Grant Date Fair Value
Outstanding, beginning - grant date fair value	$ 3,298,196	$ 2,966,028
Options granted - grant date fair value	610,305	363,089
Options exercised - grant date fair value	(4,241)	0
Options cancelled/forfeited/expired - grant date fair value	(434,962)	(30,921)
Outstanding, ending - grant date fair value	3,469,298	3,298,196	$ 2,966,028
Vested - grant date fair value	2,122,478	1,885,850
Exercisable - grant date fair value	$ 2,122,478	$ 1,885,850