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8. Income Taxes (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014 | Dec. 31, 2013
Current tax expense |  |  |  |  |  |
US Federal |  |  |  |  | $ 0 | $ 0
State and local |  |  |  |  | 0 | 0
Foreign |  |  |  |  | 7,080 | 3,944
Total current tax expense |  |  |  |  | 7,080 | 3,944
Deferred tax expense (benefit) |  |  |  |  |  |
US Federal |  |  |  |  | 0 | 0
State and local |  |  |  |  | 0 | 0
Foreign |  |  |  |  | 0 | 0
Total deferred tax expense (benefit) |  |  |  |  | 0 | 0
Total tax expense |  |  |  |  |  |
US federal |  |  |  |  | 0 | 0
State and local |  |  |  |  | 0 | 0
Foreign |  |  |  |  | 7,080 | 3,944
Total | $ 1,978 | $ 1,797 | $ 5,757 | $ 5,839 | $ 7,080 | $ 3,944

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