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Basis of Presentation and Significant Accounting Policies - Additional information (Details)
 12 Months Ended
Sep. 30, 2025
USD ($)
Subsidiary
Customer
Segment
Sep. 30, 2024
USD ($)
Customer
Sep. 30, 2023
USD ($)
Basis of Presentation and Siginificant Accounting Policies [Line Items]      
Number of wholly owned subsidiaries | Subsidiary 6    
Number of additional inactive subsidiaries | Subsidiary 1    
Cash and cash equivalents retained in foreign banks $ 222,000    
Investments typical final maturity maximum year 3 years    
Investments typical portfolio weighted average maturity month 18 months    
Cash and cash equivalents $ 7,969,000 $ 4,945,000  
Restricted cash 585,000 345,000  
Allowance for doubtful accounts for expected credit losses 65,000 65,000  
Inventory Obsolescence Write Down (Recoveries) (2,000) 453,000  
Goodwill impairment charge 0 0  
Shipping and handling costs 139,000 128,000  
Cost of revenue 23,801,000 13,819,000  
Advertising expense 90,000 454,000  
Warranty reserve 62,000 76,000 $ 132,000
Impairment of long-lived assets $ 0 0  
Number of reportable segments | Segment 2    
Translation gain $ 210,000 152,000  
Change in fair value of Term Loans related to credit risk 820,000 0  
Shipping and Handling [Member]      
Basis of Presentation and Siginificant Accounting Policies [Line Items]      
Cost of revenue $ 181,000 $ 187,000  
Minimum [Member]      
Basis of Presentation and Siginificant Accounting Policies [Line Items]      
Property, plant and equipment, estimated useful lives 2 years    
Estimated useful lives 3 years    
Maximum [Member]      
Basis of Presentation and Siginificant Accounting Policies [Line Items]      
Property, plant and equipment, estimated useful lives 7 years    
Estimated useful lives 15 years    
Customer Concentration Risk [Member] | Accounts Receivable [Member]      
Basis of Presentation and Siginificant Accounting Policies [Line Items]      
Number of major customers | Customer 3 3  
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer 1 [Member]      
Basis of Presentation and Siginificant Accounting Policies [Line Items]      
Concentration risk percentage 30.00% 15.00%  
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer 2 [Member]      
Basis of Presentation and Siginificant Accounting Policies [Line Items]      
Concentration risk percentage 13.00% 14.00%  
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer 3 [Member]      
Basis of Presentation and Siginificant Accounting Policies [Line Items]      
Concentration risk percentage 12.00% 11.00%