Accounting policies (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accounting Policies [Line Items]
Foreign Currency Transaction Gain (Loss), before Tax	$ (119,174)	$ 7,029	$ 46,680	$ 32,696