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Long-Term Debt - Additional Information (Details) - USD ($)
6 Months Ended
Apr. 21, 2020
Jun. 30, 2020
Mar. 20, 2020
Mar. 19, 2020
Dec. 31, 2019
Debt Instrument          
Loan term for equipment covered by loan   60 months      
Lease line of credit   $ 1,000,000      
Principal maturities of long-term debt for 2020   430,000      
Principal maturities of long-term debt for 2021   4,635,000      
Principal maturities of long-term debt for 2022   5,037,000      
Principal maturities of long-term debt for 2023   154,000      
Principal maturities of long-term debt for 2024   $ 93,000      
Paycheck Protection Program Loan [Member]          
Debt Instrument          
Debt Instrument, Face Amount $ 4,000,000        
Debt Instrument, Term 2 years        
Percentage of fixed interest rate payable   1.00%      
Lease term for equipment covered by lease line of credit 2 years        
Line of credit payable to a financial institution; Interest rate option of bank prime or Libor plus 1.65% (1.579% as of June 30, 2020) (B) (C )          
Debt Instrument          
Maximum borrowing capacity     $ 6,000,000 $ 4,000,000  
Spread on variable rate   1.65%      
Percentage of fixed interest rate payable   1.579%      
Commitment fee on unused portion of line of credit   0.25%      
Balance outstanding of line of credit   $ 3,750,000     $ 3,000,000
Equipment note obligations; Interest rate fixed for term of each funding based upon the Lender's lease pricing at time of funding. (Interest rate/factor 1.8259% - 1.835015% as of June 30, 2020) (D)          
Debt Instrument          
Maximum borrowing capacity   2,500,000      
Balance outstanding of line of credit   $ 602,000     670,000
Loan term for equipment covered by loan   60 months      
Payments for purchase of machinery and equipment   $ 721,000      
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) (E)          
Debt Instrument          
Debt Instrument, Term   60 months      
Lease line of credit   $ 1,000,000      
Lease term for equipment covered by lease line of credit   60 months      
Leases line of credit outstanding   $ 388,000     $ 468,000