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Debt - Narrative (Details)
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 21, 2023
USD ($)
May 31, 2019
USD ($)
Apr. 30, 2019
USD ($)
installment
Dec. 31, 2023
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
May 21, 2024
USD ($)
Nov. 08, 2023
USD ($)
Aug. 09, 2023
USD ($)
Aug. 08, 2023
USD ($)
May 21, 2023
USD ($)
Line of Credit Facility [Line Items]                      
Long-term debt, gross         $ 24,005,000 $ 16,663,000          
Line of Credit                      
Line of Credit Facility [Line Items]                      
Percentage of stock pledged on credit agreement         66.67%            
Subordinated note | Director                      
Line of Credit Facility [Line Items]                      
Long-term debt, gross         $ 3,510,000 0          
Revolving credit agreement | Line of Credit                      
Line of Credit Facility [Line Items]                      
Revolving line of credit, accumulated amortization of debt issuance costs         461,000 78,000          
Debt instrument, unamortized discount premium           87,000          
Long-term debt, gross         20,142,000 16,289,000          
Credit Agreement | Revolving credit agreement | Line of Credit                      
Line of Credit Facility [Line Items]                      
Revolving credit facility, maximum borrowing capacity $ 19,000,000       $ 26,000,000 30,000,000     $ 23,000,000 $ 28,000,000  
Reserves under borrowing base             $ 1,500,000 $ 1,500,000   $ 1,500,000  
Fixed charge coverage ratio                   1.1  
Debt instrument, covenant combined commitment percentage                   10.00%  
Debt instrument, covenant combined borrowing base, percentage                   10.00%  
Debt instrument, covenant combined borrowing base, amount                   $ 2,000,000  
Commitment fee percentage         0.50%            
Available funds         $ 2,055,000 2,830,000          
Debt instrument, terminated amount         0            
Debt Instrument, collateral amount         24,293,000 21,089,000          
Letters of credit         $ 1,970,000 $ 1,970,000          
Weighted average interest rate, revolving credit facility         8.10% 7.70%          
Debt issuance costs incurred in period       $ 117,000              
Revolving line of credit, accumulated amortization of debt issuance costs         $ 117,000            
Credit Agreement | Revolving credit agreement | Line of Credit | Secured Overnight Financing Rate (SOFR)                      
Line of Credit Facility [Line Items]                      
Basis spread         2.75% 2.25%          
Export Credit Facility | Revolving credit agreement | Line of Credit                      
Line of Credit Facility [Line Items]                      
Revolving credit facility, maximum borrowing capacity                 7,000,000    
Debt instrument, terminated amount         $ 0            
Fully earned and non-refundable fee         $ 6,000            
Weighted average interest rate, revolving credit facility         7.60% 7.20%          
Export Credit Facility | Revolving credit agreement | Line of Credit | Secured Overnight Financing Rate (SOFR)                      
Line of Credit Facility [Line Items]                      
Basis spread         2.25% 1.75%          
Export Credit Facility | Revolving credit agreement | Line of Credit | Export-Import Bank of the United States of America                      
Line of Credit Facility [Line Items]                      
Fully earned and non-refundable fee         $ 5,000            
Credit Agreement And Export Credit Facility | Revolving credit agreement | Line of Credit                      
Line of Credit Facility [Line Items]                      
Revolving credit facility, maximum borrowing capacity 23,000,000               30,000,000 $ 35,000,000  
Credit Agreement And Export Credit Facility | Revolving credit agreement | Line of Credit | Debt Covenant Period One                      
Line of Credit Facility [Line Items]                      
Revolving credit facility, maximum borrowing capacity             18,000,000        
Debt covenant, maximum principal balance                 18,000,000    
Reserves under borrowing base                 1,500,000    
Credit Agreement And Export Credit Facility | Revolving credit agreement | Line of Credit | Debt Covenant Period Two                      
Line of Credit Facility [Line Items]                      
Revolving credit facility, maximum borrowing capacity             19,000,000        
Debt covenant, maximum principal balance                 19,000,000    
Reserves under borrowing base                 $ 2,000,000    
Credit Agreement And Export Credit Facility | Revolving credit agreement | Line of Credit | Debt Covenant Period Three                      
Line of Credit Facility [Line Items]                      
Revolving credit facility, maximum borrowing capacity             22,000,000        
Credit Agreement And Export Credit Facility | Revolving credit agreement | Line of Credit | Debt Covenant Period Four                      
Line of Credit Facility [Line Items]                      
Revolving credit facility, maximum borrowing capacity             $ 0        
Subordinated Promissory Note | Subordinated note | Director                      
Line of Credit Facility [Line Items]                      
Reserves under borrowing base 1,500,000                    
Debt face amount $ 3,000,000                    
Borrowing base calculation, percentage 85.00%                    
Borrowing base, percentage of eligible inventory 70.00%                    
Monthly increase in reserves under borrowing base $ 250,000                    
Commitment fee percentage 0.50%                    
PIK interest amount         360,000            
Fully earned and non-refundable fee $ 150,000                    
Available funds paid to borrowers $ 3,000,000                    
Interest rate, fixed percentage 14.00%                    
Guaranty fee $ 760,000       880,000           $ 120,000
Subordinated Promissory Note | Subordinated note | Secured Overnight Financing Rate (SOFR) | Director                      
Line of Credit Facility [Line Items]                      
Basis spread 2.75%                    
Subordinated Promissory Note | Subordinated note | CB Floating Rate | Director                      
Line of Credit Facility [Line Items]                      
Basis spread 0.25%                    
ED Loan | Unsecured Debt                      
Line of Credit Facility [Line Items]                      
Debt face amount     $ 864,000                
Debt instrument, maturity term     5 years                
Long-term debt, gross         133,000 $ 194,000          
Remaining of installments | installment     3                
ED Loan | Unsecured Debt | Debt Covenant Period One                      
Line of Credit Facility [Line Items]                      
Interest rate, fixed percentage     0.00%                
ED Loan | Unsecured Debt | Debt Covenant Period Two                      
Line of Credit Facility [Line Items]                      
Interest rate, fixed percentage     2.00%                
ED Loan | Unsecured Debt | Prime Rate                      
Line of Credit Facility [Line Items]                      
Basis spread     1.00%                
VPI Loan | Unsecured Debt                      
Line of Credit Facility [Line Items]                      
Debt face amount   $ 180,000                  
Debt instrument, maturity term   5 years                  
Long-term debt, gross         $ 220,000 $ 180,000          
Interest rate   3.56%