XML 45 R36.htm IDEA: XBRL DOCUMENT v3.22.2
Revenue Recognition and Related Costs - Additional Information (Detail) - USD ($)
 9 Months Ended
Jun. 30, 2022
Sep. 30, 2021
Disaggregation of Revenue [Line Items]    
Amortization period for incremental costs 1 year  
Costs and estimated earnings in excess of billings $ 1,366,000 $ 1,903,000
Contract assets collection period 1 year  
Accounts receivable related to contracts with customers $ 79,000 210,000
Current Liabilities [Member]    
Disaggregation of Revenue [Line Items]    
Customer deposits related to contracts with customers $ 7,436,000 $ 5,244,000