STOCK-BASED COMPENSATION - Activity Summary (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Number of Shares
Outstanding Options, Beginning of period (in shares)	4,675,000	2,275,000
Exercisable Options (in shares)	4,347,500	3,010,000	2,200,000
Options Granted (in shares)	422,000	2,400,000
Options Forfeited (in shares)	(100,000)
Outstanding Options, End of period (in shares)	4,997,000	4,675,000	2,275,000
Weighted Average Exercise Price
Outstanding (in dollars per share)	$ 0.85	$ 0.76	$ 0.33
Exercisable (in dollars per share)	0.74	0.54	$ 0.30
Granted (in dollars per share)	$ 1.86	$ 1.16
Remaining Contractual Term (Years)
Outstanding	4 years 5 months 9 days	5 years 4 months 21 days	6 years 6 months
Exercisable	4 years 5 months 23 days	5 years 11 months 19 days	6 years 8 months 19 days
Granted	5 years 8 months 9 days	5 years 4 months 2 days
Stock Compensation Plan
Number of Shares
Options Granted (in shares)	422,000