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Long-Term Debt (Detail Textuals) - USD ($)
6 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Principal maturities of long-term debt for 2019 $ 422,000  
Principal maturities of long-term debt for 2020 844,000  
Principal maturities of long-term debt for 2021 1,630,000  
Principal maturities of long-term debt for 2022 282,000  
Principal maturities of long-term debt for 2023 135,000  
Principal maturities of long-term debt for 2024 $ 60,000  
Lease term for equipment covered by lease line of credit 60 months  
Percentage of floating interest rate payable 5.00%  
Term loan payable to a financial institution; Interest rate option of bank prime or Libor plus 1.4% (3.840% as of June 30, 2019), monthly prinicipal payments of $21,833 through 2021 with a balloon payment of $786,000 due December 1, 2021    
Debt Instrument [Line Items]    
Description of rate basis Libor  
Percentage of floating interest rate payable 1.40%  
Term loan payable to a financial institution; Interest rate option of bank prime or Libor plus 1.4% (3.840% as of June 30, 2019), monthly prinicipal payments of $23,810 through December 1, 2021    
Debt Instrument [Line Items]    
Description of rate basis Libor  
Percentage of floating interest rate payable 1.40%  
Equipment financing lease obligations; Interest rate fixed for term of each funding based upon the Lender's lease pricing at time of funding. (Interest rate/factor 1.822758% - 1.869304% at time of funding)    
Debt Instrument [Line Items]    
Lease line of credit $ 1,000,000  
Leases line of credit outstanding $ 617,000 $ 704,000
Description of rate basis Interest rate/factor  
Equipment note obligations; Interest rate fixed for term of each funding based upon the Lender's pricing at time of funding. (Interest rate/factor 3.3943% - 3.8527% at time of funding)    
Debt Instrument [Line Items]    
Loan line of credit $ 2,500,000  
Loan term for equipment covered by loan 60 months  
Line of credit $ 601,000  
Description of rate basis Interest rate/factor