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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

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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