Stockholders' equity (Deficit) (Details 1) (USD $)	6 Months Ended
	Dec. 31, 2014
Warrants Issuance One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Issued	July 2013
Expiration Date	July 2016
Exercise Price	$ 2
Number of Warrants	125,000
Warrants Issuance Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Issued	February 2014
Expiration Date	February 2019
Exercise Price	$ 1
Number of Warrants	1,000,000
Warrants Issuance Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Issued	February 2014
Expiration Date	February 2017
Exercise Price	$ 1.50
Number of Warrants	200,000
Warrants Issuance Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Issued	February 2014
Expiration Date	February 2017
Exercise Price	$ 2
Number of Warrants	200,000