Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Equipment Loans - Additional Information (Details)

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Long-Term Debt - Equipment Loans - Additional Information (Details)
12 Months Ended
Sep. 30, 2019
USD ($)
Note #1 Payable to Banc of America Leasing & Capital  
Debt Instrument [Line Items]  
Debt face amount $ 5,000,000
Debt maturity date Sep. 23, 2021
Debt periodic frequency 59 monthly payments
Debt periodic payment $ 84,000
Debt initial payment date Sep. 23, 2016
Debt final payment $ 584,000
Debt stated interest rate 3.90%
Note #2 Payable to Banc of America Leasing & Capital  
Debt Instrument [Line Items]  
Debt face amount $ 2,210,000
Debt maturity date Jan. 30, 2022
Debt periodic frequency 59 monthly payments
Debt periodic payment $ 35,000
Debt initial payment date Jan. 30, 2017
Debt final payment $ 477,000
Debt stated interest rate 4.60%
Note #3 Payable to Banc of America Leasing & Capital  
Debt Instrument [Line Items]  
Debt face amount $ 3,680,000
Debt maturity date Dec. 30, 2023
Debt periodic frequency 84 monthly payments
Debt periodic payment $ 52,000
Debt initial payment date Jan. 30, 2017
Debt stated interest rate 4.80%
Note #4 Payable to Banc of America Leasing & Capital  
Debt Instrument [Line Items]  
Debt face amount $ 1,095,000
Debt maturity date Dec. 30, 2023
Debt periodic frequency 81 monthly payments
Debt periodic payment $ 16,000
Debt initial payment date Apr. 30, 2017
Debt stated interest rate 4.90%
Note #5 Payable to Bank of America Leasing & Capital  
Debt Instrument [Line Items]  
Debt face amount $ 3,932,000
Debt maturity date Dec. 28, 2024
Debt periodic frequency 84 monthly payments
Debt periodic payment $ 55,000
Debt initial payment date Jan. 28, 2018
Debt stated interest rate 4.70%
Note #6 Payable to Bank of America Leasing & Capital  
Debt Instrument [Line Items]  
Debt face amount $ 913,000
Debt maturity date Jul. 29, 2024
Debt periodic frequency 60 monthly payments
Debt periodic payment $ 55,000
Debt initial payment date Aug. 28, 2019
Debt stated interest rate 4.70%