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Credit Facilities - Narrative (Details) | 9 Months Ended |
--- | --- | ---
Jun. 30, 2020 USD ($) | Sep. 30, 2019 USD ($)
Interest Rate Swap |  |
Line of Credit Facility [Line Items] |  |
Derivative notional amount |  | $ 36,000,000
Derivative fixed interest rate |  | 1.61%
Interest expense increase (less than) | $ 100,000 |
Secured Debt | Term Loans |  |
Line of Credit Facility [Line Items] |  |
Secured term loan, face amount | $ 70,000,000 |
Required amortization percentage in year 1 | 7.50% |
Required amortization percentage in year 2 | 7.50% |
Required amortization percentage in year 3 | 10.00% |
Required amortization percentage in year 4 | 10.00% |
Required amortization percentage in year 5 | 12.50% |
Fixed charge coverage ratio | 1.25 |
Ratio of funded indebtedness to EBITDA through maturity | 3.25 |
Debt quarterly installment payments | $ 1,312,500 |
Period of frequency to increase quarterly installment payments | 2 years |
Increase in quarterly periodic payments | $ 437,500 |
Secured Debt | Term Loans | Excess Cash Flows Greater Than Or Equal to 2.50 |  |
Line of Credit Facility [Line Items] |  |
Percentage of excess cash flow for each year of funded indebtedness to EBDTA | 75.00% |
Ratio of funded indebtedness to adjusted EBDTA, actual | 2.50 |
Secured Debt | Term Loans | Excess Cash Flows Less Than 2.50 [Member] |  |
Line of Credit Facility [Line Items] |  |
Percentage of excess cash flow for each year of funded indebtedness to EBDTA | 50.00% |
Secured Debt | Term Loans | Excess Cash Flows Equal to 1.50 |  |
Line of Credit Facility [Line Items] |  |
Ratio of funded indebtedness to adjusted EBDTA, actual | 1.5 |
Secured Debt | Term Loans | Excess Cash Flows Less Than 1.50 |  |
Line of Credit Facility [Line Items] |  |
Percentage of excess cash flow for each year of funded indebtedness to EBDTA | 0.00% |
Ratio of funded indebtedness to adjusted EBDTA, actual | 1.5 |
Secured Debt | Term Loans | Maximum |  |
Line of Credit Facility [Line Items] |  |
Ratio of funded indebtedness to EBITDA through maturity | 4.25 |
Secured Debt | Term Loans | Maximum | Excess Cash Flows Less Than 2.50 [Member] |  |
Line of Credit Facility [Line Items] |  |
Ratio of funded indebtedness to adjusted EBDTA, actual | 2.50 |
Secured Debt | Term Loans | LIBOR |  |
Line of Credit Facility [Line Items] |  |
Interest rate spread | 0.17% |
Secured Debt | Term Loans | LIBOR | Maximum |  |
Line of Credit Facility [Line Items] |  |
Interest rate spread | 4.50% |
Secured Debt | Term Loans | LIBOR | Minimum |  |
Line of Credit Facility [Line Items] |  |
Interest rate spread | 2.50% |
Secured Debt | Revolving Line of Credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit, maximum borrowing capacity | $ 25,000,000.0 |
Line of credit, current borrowing capacity | 19,300,000 |
Secured Debt | Letter of Credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit, current borrowing capacity | $ 3,000,000 |

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