Quarterly report pursuant to Section 13 or 15(d)

Summary of significant accounting policies (Details 2)

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Summary of significant accounting policies (Details 2) - shares
9 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Common stock equivalents 2,018,668 802,448
Option [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Common stock equivalents 1,263,859 160,000
Warrants [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Common stock equivalents 754,809 642,448