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Stockholder's Equity (Details 2) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Number of Shares      
Outstanding at beginning 106,253,339 103,208,331 86,925,000
Granted 6,220,000 21,250,000
Forfeited   (4,966,669)
Exercised   (3,174,992)  
Outstanding at end 106,253,339 106,253,339 103,208,331
Exercisable at end 97,165,278 92,925,694  
Weighted Average Exercise Price      
Outstanding at beginning $ 0.20 $ 0.19 $ 0.21
Granted 0.22 0.11
Forfeited   0.08
Exercised   0.13  
Outstanding at end 0.20 0.20 $ 0.19
Exercisable at end $ 0.20 $ 0.20  
Weighted Average Contractual Term (Yrs.)      
Outstanding at beginning 7 years 4 months 24 days 9 years 6 months 8 years 8 months 12 days
Granted   10 years 10 years
Exercised    
Outstanding at end 7 years 1 month 6 days 9 years 6 months 9 years 6 months
Exercisable at end 7 years 1 month 6 days 7 years 4 months 24 days  
Outstanding at beginning $ 1,989,163 $ 10,023,400 $ 7,698,650
Granted   2,868,750 7,475,000
Forfeited    
Exercised    
Outstanding at end 1,989,163 1,989,163 $ 10,023,400
Exercisable at end $ 1,886,038 $ 3,316,208