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Debt - Narrative (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 21, 2023
USD ($)
Dec. 31, 2023
USD ($)
lender
Jun. 30, 2024
USD ($)
customer
Sep. 30, 2023
USD ($)
May 21, 2024
USD ($)
Nov. 08, 2023
USD ($)
May 21, 2023
USD ($)
Line of Credit Facility [Line Items]              
Debt instrument, number of lenders | lender   2          
Number of customer invoices factored | customer     1        
Foreign subsidiary borrowings, net of unamortized debt issuance cost              
Line of Credit Facility [Line Items]              
Receivables pledged as collateral     $ 2,710,000 $ 1,247,000      
Long-term debt, gross     $ 9,722,000 5,771,000      
Foreign subsidiary borrowings, net of unamortized debt issuance cost | Euribor | Minimum              
Line of Credit Facility [Line Items]              
Euribor variable interest rates     0.50%        
Foreign subsidiary borrowings, net of unamortized debt issuance cost | Euribor | Maximum              
Line of Credit Facility [Line Items]              
Euribor variable interest rates     7.80%        
First Loan              
Line of Credit Facility [Line Items]              
Face amount   $ 2,208,000          
Debt instrument, term   7 years          
Quarterly payment   $ 200,000          
Second Loan              
Line of Credit Facility [Line Items]              
Face amount   $ 1,104,000          
Debt instrument, term   1 year 6 months          
Revolving credit agreement | Revolving credit agreement              
Line of Credit Facility [Line Items]              
Revolving line of credit, accumulated amortization of debt issuance costs     $ 86,000 78,000      
Remaining unamortized amount     86,000 86,000      
Long-term debt, gross     19,693,000 16,289,000      
Revolving credit agreement | Credit Agreement | Revolving credit agreement              
Line of Credit Facility [Line Items]              
Reserves under borrowing base     1,500,000 1,500,000 $ 1,500,000 $ 1,500,000  
Revolving credit facility, maximum borrowing capacity $ 19,000,000   $ 26,000,000 30,000,000      
Commitment fee percentage     0.50%        
Receivables pledged as collateral     $ 24,576,000 21,089,000      
Remaining borrowing capacity     2,912,000 2,830,000      
Letters of credit outstanding, amount     $ 1,970,000 $ 1,970,000      
Weighted average interest rate, revolving credit facility     8.20% 7.70%      
Debt issuance costs incurred in period   $ 117,000          
Revolving line of credit, accumulated amortization of debt issuance costs     $ 81,000        
Revolving credit agreement | Credit Agreement | Revolving credit agreement | SOFR              
Line of Credit Facility [Line Items]              
Basis spread     2.75% 2.25%      
Revolving credit agreement | Credit Agreement and Export Credit Facility | Revolving credit agreement              
Line of Credit Facility [Line Items]              
Revolving credit facility, maximum borrowing capacity 23,000,000            
Revolving credit agreement | Credit Agreement and Export Credit Facility | Revolving credit agreement | Debt Covenant Period One              
Line of Credit Facility [Line Items]              
Revolving credit facility, maximum borrowing capacity         18,000,000    
Revolving credit agreement | Credit Agreement and Export Credit Facility | Revolving credit agreement | Debt Covenant Period Two              
Line of Credit Facility [Line Items]              
Revolving credit facility, maximum borrowing capacity         19,000,000    
Revolving credit agreement | Credit Agreement and Export Credit Facility | Revolving credit agreement | Debt Covenant Period Three              
Line of Credit Facility [Line Items]              
Revolving credit facility, maximum borrowing capacity         22,000,000    
Revolving credit agreement | Credit Agreement and Export Credit Facility | Revolving credit agreement | Debt Covenant Period Four              
Line of Credit Facility [Line Items]              
Revolving credit facility, maximum borrowing capacity         $ 0    
Revolving credit agreement | Export Credit Facility | Revolving credit agreement              
Line of Credit Facility [Line Items]              
Weighted average interest rate, revolving credit facility     7.70% 7.20%      
Revolving credit agreement | Export Credit Facility | Revolving credit agreement | SOFR              
Line of Credit Facility [Line Items]              
Basis spread     2.25% 1.75%      
Subordinated note | Director              
Line of Credit Facility [Line Items]              
Long-term debt, gross     $ 3,366,000 $ 0      
Subordinated note | Subordinated Promissory Note | Director              
Line of Credit Facility [Line Items]              
Reserves under borrowing base 1,500,000            
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%            
Available funds paid to borrowers $ 3,000,000            
Interest rate 14.00%   14.00% 0.00%      
Fully earned and non-refundable fee $ 150,000            
Long-term debt, gross     $ 3,366,000 $ 0      
Guaranty fee $ 760,000   $ 880,000       $ 120,000
Subordinated note | Subordinated Promissory Note | CBFR | Director              
Line of Credit Facility [Line Items]              
Basis spread 2.75%            
Subordinated note | Subordinated Promissory Note | CB Floating Rate | Director              
Line of Credit Facility [Line Items]              
Basis spread 0.25%            
Subordinated note | Subordinated Promissory Note | SOFR | Director              
Line of Credit Facility [Line Items]              
Basis spread 2.75%