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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred income tax liabilities: |  |
Plant, property and equipment | $ 1,022,898 | $ 847,162
Total | 1,022,898 | 847,162
Deferred income tax assets: |  |
Asset valuations | 604,755 | 575,920
Pension | 81,561 | 105,647
Other | 287,115 | 278,948
Total | 973,431 | 960,515
Net deferred income tax (liability) asset: | $ (49,467) |
Net deferred income tax (liability) asset: |  | $ 113,353

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