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Income Taxes - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2017
Income Taxes [Line Items] |  |
Deferred tax asset | $ 700,000 |
Domestic Country |  |
Income Taxes [Line Items] |  |
Net operating loss (NOL) carryforwards | $ 11,400,000 | $ 0
Minimum [Member] | State And Local Jurisdiction |  |
Income Taxes [Line Items] |  |
Operating loss carry forwards expiration year | 2029 |
Maximum [Member] | State And Local Jurisdiction |  |
Income Taxes [Line Items] |  |
Operating loss carry forwards expiration year | 2032 |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319 + Details
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