Stock-based compensation (Details Textual) - USD ($)	3 Months Ended				9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock Issuance Date	Oct. 12, 2015	Jul. 10, 2015	Apr. 13, 2015	Jan. 08, 2015
Stock Issued During Period, Shares, New Issues	83,334	83,334	83,334	83,334
Stock Issued During Period Per Share Value Of New Issues	$ 0.15	$ 0.15	$ 0.15	$ 0.15
Stock Issued During Period, Value, New Issues	$ 12,500	$ 12,500	$ 12,500	$ 12,500
Two Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock Issued During Period, Shares, New Issues	41,667	41,667	41,667	41,667
Stock Issued During Period, Value, New Issues	$ 12,500
Director One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares					25,000