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Short-Term Borrowings and Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Debt Instrument [Line Items]
Long-term debt	$ 48,693
Less: current portion	(2,882)	$ (3,587)
Less: unamortized portion of debt issuance costs	(510)	(595)
Long-term debt, net current portion and unamortized debt issuance costs	45,301	47,498
Mortgage Facility [Member]
Debt Instrument [Line Items]
Long-term debt	48,693	51,680
Mortgage Facility [Member] | Mortgage Facility Payable to Flagship Bank [Member]
Debt Instrument [Line Items]
Long-term debt	6,403	6,899
Mortgage Facility [Member] | Mortgage Facility Payable to Seacoast National Bank [Member]
Debt Instrument [Line Items]
Long-term debt	17,098	17,675
Mortgage Facility [Member] | Mortgage facility payable to Hancock Whitney Bank [Member]
Debt Instrument [Line Items]
Long-term debt	$ 25,192	$ 27,106

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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