9. Income taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Income Taxes Details
Computed "expected" tax (expense) benefit	$ 1,008,204	$ (1,721,159)
Reduction in income taxes resulting from income taxes in other tax jurisdictions	(1,007,419)	1,721,775
Other	(84)	(149)
Change in taxation rates in other jurisdictions	2,713	2,786
Change in exchange rates	(3,885)	(4,807)
Change in valuation allowance	(9)	706
Income tax expense	$ (480)	$ (848)