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Short-Term Borrowings and Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Sep. 30, 2020
Debt Instrument [Line Items]    
Long-term debt $ 51,680  
Less: current portion (3,587) $ (507)
Less: unamortized portion of debt issuance costs (595)  
Long-term debt, net current portion and unamortized debt issuance costs 47,498 $ 7,343
Mortgage Facility [Member]    
Debt Instrument [Line Items]    
Long-term debt 51,680  
Long-term debt, net current portion and unamortized debt issuance costs 7,400  
Mortgage Facility [Member] | Mortgage Facility Payable to Flagship Bank [Member]    
Debt Instrument [Line Items]    
Long-term debt 6,899  
Mortgage Facility [Member] | Mortgage Facility Payable to Seacoast National Bank [Member]    
Debt Instrument [Line Items]    
Long-term debt 17,675  
Mortgage Facility [Member] | Mortgage facility payable to Hancock Whitney Bank [Member]    
Debt Instrument [Line Items]    
Long-term debt $ 27,106