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Revenue Recognition and Related Costs - Additional Information (Detail) - USD ($)
 3 Months Ended
Dec. 31, 2022
Sep. 30, 2022
Disaggregation of Revenue [Line Items]    
Amortization period for incremental costs 1 year  
Costs and estimated earnings in excess of billings $ 4,950,000 $ 2,118,000
Contract assets collection period 1 year  
Accounts receivable related to contracts with customers $ 133,000 142,000
Current Liabilities [Member]    
Disaggregation of Revenue [Line Items]    
Customer deposits related to contracts with customers $ 8,387,000 $ 5,864,000