Annual report pursuant to Section 13 and 15(d)

Benefit Plans and Collective Bargaining Agreements (Narrative) (Details)

v3.8.0.1
Benefit Plans and Collective Bargaining Agreements (Narrative) (Details) - USD ($)
12 Months Ended
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%