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Benefit Plans and Collective Bargaining Agreements (Narrative) (Details) - USD ($) | 12 Months Ended |
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Jun. 27, 2014
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] |  |  |  |
Employer contributions to union-sponsored defined contribution retirement plans | $ 29,042 | $ 22,256 | $ 37,712 |
Bristol Fab [Member] |  |  |  |
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] |  |  |  |
Pension withdrawal liability from closure of Bristol Fab |  |  |  | $ 1,904,628
Other Pension Plan, Postretirement or Supplemental Plans [Member] | Maximum [Member] |  |  |  |
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] |  |  |  |
Defined Benefit Plan, Funded Percentage | 80.00% |  |  |
Defined Benefit Plan, Employer Contribution as Percent of Total Contributions | 5.00% |  |  |

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