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v3.21.2

Summary of Significant Accounting Policies - Narrative (Details) |  | 12 Months Ended |
--- | --- | --- | ---
Apr. 02, 2021 USD ($) segment | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Mar. 10, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Allowance for doubtful accounts |  | $ 0 | $ 0 |
Depreciation expense |  | 420,000 | 428,000 |
Number of reporting units | segment | 2 |  |  |
Unrecognized tax benefits |  | 0 | 0 |
Interest expense |  | $ 4,500,000 | $ 5,300,000 |
Revenue Benchmark | Customer Concentration Risk | One Purchaser |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Concentration risk, percentage |  | 87.00% | 86.00% |
Minimum |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Property and equipment, useful life |  | 3 years |  |
Contact term |  | 1 year |  |
Maximum |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Property and equipment, useful life |  | 39 years |  |
Contact term |  | 10 years |  |
Kansas Properties |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Goodwill | $ 19,000,000 |  |  | $ 19,000,000
Discontinued operation, carrying value | 22,000,000 |  |  |
Discontinued operation, fair value | $ 3,500,000 |  |  |
Goodwill impairment |  | $ 18,500,000 |  |
Kansas Properties |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Consideration |  |  |  | $ 3,500,000
General and Administrative Expense |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Lease expense |  | $ 400,000 | $ 400,000 |

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