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STOCKHOLDERS' EQUITY (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Number ofShares    
Outstanding at December 31, 2017 1,632,000 0
Granted 0 1,632,000
Exercised 0 0
Expired/Forfeited 0 0
Outstanding at December 31, 2018 1,632,000 1,632,000
Exercisable at December 31, 2018 994,000 841,333
Weighted-average Exercise Price    
Outstanding at December 31, 2017 $ 7.80 $ 0
Granted 0 7.80
Exercised 0 0
Expired/Forfeited 0 0
Outstanding at December 31, 2018 7.80 7.80
Exercisable at December 31, 2018 $ 7.80 $ 7.80
Weighted-average Remaining Contractual Term (years), Granted   10 years
Weighted-average Remaining Contractual Term (years) 8 years 9 months 26 days 9 months 26 days
Weighted-average Remaining Contractual Term (years), Exercisable 8 years 9 months 15 days 9 years 11 days
Aggregate Intrinsic Value $ 0.00 $ 0