Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Millions |
12 Months Ended | ||
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Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2019 |
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| Goodwill and Intangible Assets Disclosure [Abstract] | |||
| Finite-lived intangible amortization expense | $ 0.3 | $ 0.2 | $ 1.1 |
| X | ||||||||||
- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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