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Long-Term Debt - Additional Information (Details) - USD ($)
9 Months Ended
Jul. 31, 2020
Apr. 21, 2020
Sep. 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      
Long-term debt     10,139,000     $ 6,019,000
Principal maturities of long-term debt for 2020     219,000      
Principal maturities of long-term debt for 2021     1,635,000      
Principal maturities of long-term debt for 2022     4,038,000      
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% (B)            
Debt Instrument            
Maximum borrowing capacity       $ 6,000,000 $ 4,000,000  
Spread on variable rate 1.65%          
Commitment fee on unused portion of line of credit 0.25%          
Balance outstanding of line of credit     $ 3,750,000     3,000,000
Long-term debt     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     $ 569,000     670,000
Loan term for equipment covered by loan     60 months      
Payments for purchase of machinery and equipment     $ 721,000      
Long-term debt     $ 569,000     670,000
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      
Long-term debt     $ 349,000     $ 468,000