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Notes Payable (Details)
3 Months Ended 9 Months Ended
Jul. 19, 2016
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2016
Notes payable to banks | Purchase of Columbia, South Carolina facility      
Debt Instrument [Line Items]      
Notes payable to banks   $ 1,249,190  
Fixed interest rate on debt (percentage) 5.29%    
Debt instrument monthly payment $ 10,673    
Debt instrument, term (in years) 15 years    
Notes payable to banks | Smaller installment loans      
Debt Instrument [Line Items]      
Debt instrument, number of loans     14
Long-term debt   1,296,822  
Annual capital expenditures limit $ 1,500,000 $ 3,500,000  
Notes payable to banks | Smaller installment loans | Minimum      
Debt Instrument [Line Items]      
Fixed interest rate on debt (percentage)   2.94%  
Notes payable to banks | Smaller installment loans | Maximum      
Debt Instrument [Line Items]      
Fixed interest rate on debt (percentage)   5.29%  
Summit Community Bank | Notes payable to banks      
Debt Instrument [Line Items]      
Notes payable to banks   $ 1,135,930  
Fixed interest rate on debt (percentage)   3.99%  
Debt instrument monthly payment   $ 25,642  
Limit on chattel mortgages on purchased equipment   250,000  
Summit Community Bank | Line of credit      
Debt Instrument [Line Items]      
Line of credit / commitment from Bank   2,000,000  
Summit Community Bank | Letter of credit      
Debt Instrument [Line Items]      
Line of credit / commitment from Bank   $ 1,500,000