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Nature of Business and Summary of Significant Accounting Policies - Enterprise Wide Disclosures and Foreign Currency Transactions (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Enterprise-Wide Disclosures |  |
Percentage of sales (as a percent) | 10.00% |
Total Net Sales | $ 116,621,719 | $ 115,191,905
Property and equipment, net | 10,330,834 | 10,507,748
Other assets | 5,152,944 | 5,343,600
Foreign Currency Transactions |  |
Foreign currency translation adjustment | 19,000 |
Foreign currency translation loss | 44,000 | 63,000
Net foreign currency transaction gains (losses) | (82,000) | (15,000)
United States |  |
Enterprise-Wide Disclosures |  |
Property and equipment, net | 8,731,205 | 9,322,484
Other assets | 5,145,218 | 5,335,874
Mexico |  |
Enterprise-Wide Disclosures |  |
Property and equipment, net | 1,238,087 | 1,185,264
Other assets | 7,726 | $ 7,726
China |  |
Enterprise-Wide Disclosures |  |
Property and equipment, net | $ 361,542 |
Export sales | Domestic |  |
Enterprise-Wide Disclosures |  |
Percentage of sales (as a percent) | 8.00% | 13.00%
Aerospace and Defense |  |
Enterprise-Wide Disclosures |  |
Total Net Sales | $ 16,115,000 | $ 14,458,000
Medical |  |
Enterprise-Wide Disclosures |  |
Total Net Sales | 53,836,000 | 41,308,000
Industrial |  |
Enterprise-Wide Disclosures |  |
Total Net Sales | $ 46,671,000 | $ 59,426,000

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