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Stock-based compensation (Details Textual) - USD ($)		1 Months Ended		3 Months Ended	6 Months Ended
	Jan. 11, 2016	Jul. 31, 2016	Apr. 30, 2016	Jun. 30, 2016	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock Issuance Date	Jan. 11, 2016
Stock Issued During Period, Shares, New Issues	83,334		58,594
Stock Issued During Period Per Share Value Of New Issues	$ 0.15		$ 0.16
Stock Issued During Period, Value, New Issues	$ 12,500		$ 9,375
Deferred Compensation Liability, Current, Total				$ 25,000	$ 25,000
Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock Issued During Period, Shares, New Issues		58,594
Stock Issued During Period Per Share Value Of New Issues		$ 0.16
Stock Issued During Period, Value, New Issues		$ 9,375
Directors Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock Issued During Period, Shares, New Issues	41,667		19,531
Stock Issued During Period, Value, New Issues				$ 9,375	$ 18,750
Directors Two [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock Issued During Period, Shares, New Issues		19,531
Director One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock Issued During Period, Shares, New Issues			39,063
Director One [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock Issued During Period, Shares, New Issues		39,063

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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