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
6 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Dec. 31, 2016
Number of shares outstanding 661,429 658,592 280,000
Number of shares fully vested and exercisable 415,068    
Option 1      
Exercise price $ 0.001    
Number of shares outstanding 555,520    
Weighted average remaining contractual life 8 years 2 months 12 days    
Number of shares fully vested and exercisable 371,840    
Weighted average remaining contractual life 8 years    
Option 2      
Exercise price $ 6.000    
Number of shares outstanding 105,909    
Weighted average remaining contractual life 9 years 3 months 18 days    
Number of shares fully vested and exercisable 43,228    
Weighted average remaining contractual life 9 years 4 months 24 days