Quarterly report pursuant to Section 13 or 15(d)

4. Stock Option Plan (Details 1)

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4. Stock Option Plan (Details 1) - $ / shares
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Number of shares outstanding 1,105,896 1,105,896 658,592
Number of shares fully vested and exercisable 516,443    
Option 1      
Exercise price $ .001    
Number of shares outstanding 555,520    
Weighted average remaining contractual life 7 years 6 months    
Number of shares fully vested and exercisable 423,500    
Weighted average remaining contractual life 7 years 3 months 18 days    
Option 2      
Exercise price $ 6.00    
Number of shares outstanding 550,376    
Weighted average remaining contractual life 9 years 3 months 18 days    
Number of shares fully vested and exercisable 92,943    
Weighted average remaining contractual life 8 years 10 months 24 days