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13. Income Taxes (Details 4) - USD ($)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Domestic    
Change in deferred tax asset for current year $ (229,462) $ (151,745)
Adjustment for prior year tax estimate to actual 212,146 (57,557)
Change in valuation allowance (17,316) (209,302)
Foreign    
Change in deferred tax asset for current year (227,975) (224,223)
Adjustment for impact of tax assessment 0 285,048
Impact on change in foreign exchange rate 0 421,643
Adjustment for prior year tax estimates to actual 0 724,041
Change in valuation allowance $ (227,975) $ 1,206,509