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Income Taxes - Deferred Tax Assets and Liabilities (Details) (USD $) | Dec. 31, 2012 | Dec. 31, 2011
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Income Tax Disclosure [Abstract] |  |
Plant, property and equipment | $ 413,160 | $ 322,604
Total | 413,160 | 322,604
Asset valuations | 543,002 | 426,429
Contribution carryforward | 157,297 | 296,802
Operating loss carryforwards and credits | 2,201,789 | 2,148,208
Pension | 448,579 | 467,087
Foreign tax credit | 43,575 | 48,847
Other | 591,066 | 418,938
Total | 3,985,308 | 3,806,311
Net deferred income tax asset before valuation allowance | 3,572,148 | 3,483,707
Valuation allowance | (2,201,789) | (2,148,208)
Net deferred income tax asset | $ 1,370,359 | $ 1,335,499

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