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Debt (Equipment Financings) (Details) - Loans Payable
$ in Thousands
12 Months Ended
Sep. 30, 2021
USD ($)
Equipment Financing Due Jun 30 2028  
Line of Credit Facility [Line Items]  
Debt instrument, interest rate, stated percentage 0.0385%
Debt Instrument, Face Amount $ 1,348
Equipment Financing Due July 31 2029  
Line of Credit Facility [Line Items]  
Debt Instrument, Face Amount $ 14,238
Debt instrument, interest rate, 0.0475%
Debt instrument, basis spread on variable rate 3.75%
Equipment Financing Due July 31 2029 | LIBOR  
Line of Credit Facility [Line Items]  
Debt instrument, basis spread on variable rate 1.00%
Equipment Financing Due Jun 30 2029  
Line of Credit Facility [Line Items]  
Debt instrument, interest rate, stated percentage 0.0409%
Debt Instrument, Face Amount $ 1,653
Equipment Financing Due March 31 2028  
Line of Credit Facility [Line Items]  
Debt instrument, interest rate, stated percentage 0.0385%
Debt Instrument, Face Amount $ 3,630
2021 Equipment Financing Due April 30 2021  
Line of Credit Facility [Line Items]  
Debt instrument, interest rate, stated percentage 0.0409%
Debt Instrument, Face Amount $ 2,559
2020 Equipment Financing Due April 30, 2021  
Line of Credit Facility [Line Items]  
Debt instrument, interest rate, stated percentage 0.0409%
Debt Instrument, Face Amount $ 3,899
Equipment Financing Due December, 2027  
Line of Credit Facility [Line Items]  
Debt instrument, interest rate, stated percentage 0.0373%
Debt Instrument, Face Amount $ 3,905
Equipment Financings  
Line of Credit Facility [Line Items]  
Debt Instrument, Face Amount $ 37,496
Equipment Financing Due Sept 30 2028  
Line of Credit Facility [Line Items]  
Debt instrument, interest rate, stated percentage 0.038%
Debt Instrument, Face Amount $ 6,264