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Income Taxes - Additional Information (Detail) | 9 Months Ended
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Jun. 30, 2021 USD ($)
Income Tax Disclosure [Line Items] |
Unrecognized income tax benefits | $ 0
Federal |
Income Tax Disclosure [Abstract] |
Number of years for examination | 4 years
New York |
Income Tax Disclosure [Abstract] |
Number of years for examination | 4 years
Connecticut |
Income Tax Disclosure [Abstract] |
Number of years for examination | 4 years
Pennsylvania |
Income Tax Disclosure [Abstract] |
Number of years for examination | 4 years
New Jersey |
Income Tax Disclosure [Abstract] |
Number of years for examination | 5 years

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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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