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14. Income Taxes (Details 1) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |
Tax benefit at federal statutory rate | $ 113,588 | $ (397,038)
State income tax effect | 12,602 | (34,609)
Foreign income tax effect | (102,078) | 37,996
Non-deductible items | 492 | 930
Percentage depletion | (47,341) | (58,056)
Impact on change in federal tax rate | 0 | (6,660)
Change in prior year estimate | (95,687) | 0
Change in valuation allowance - Domestic | (221,837) | 229,462
Change in valuation allowance - Foreign | 340,261 | 227,975
Gain on settlement of foreign tax assessment | (332,332) | 0
Total | $ (332,332) | $ 0

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