XML 49 R36.htm IDEA: XBRL DOCUMENT v3.25.2
Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]    
Net unrealized gains (losses) $ 2,412,000 $ 4,316,000
Transfers of investments between Level 1 and Level 2 0 0
Impairment loss recognized on an asset group 0 0
Valuation allowance 0 0
Contract assets 9,339,000 1,508,000
Net revenue 113,166,000 105,075,000
Accounts receivable related to contracts with customers 163,000 114,000
Total long-term assets $ 15,279,000 16,970,000
Fair Value Measurement Asset Transfers Net   10,000,000
Maximum [Member]    
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]    
Contract assets collection period 1 year  
Current Liabilities [Member]    
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]    
Customer deposits related to contracts with customers $ 5,018,000 $ 6,815,000
Entities Owned by One Global Company [Member] | Revenue [Member] | Customer One [Member]    
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]    
Percentage of Concentration Risk 11.30% 14.80%
Three to Four Years Old Inventory [Member]    
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]    
Inventory, maximum time period on the shelf, years 4 years  
Cost basis reduction in inventory, percentage 50.00%  
Four to Five Years Old Inventory [Member]    
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]    
Inventory, maximum time period on the shelf, years 5 years  
Cost basis reduction in inventory, percentage 75.00%  
Greater Than Five Years Old Inventory [Member]    
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]    
Inventory, minimum time period on the shelf, years 5 years  
Inventory valuation estimate $ 0