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Long-term Debt and Other Credit Arrangements - Additional Information (Detail) - USD ($)
Dec. 19, 2022
Apr. 30, 2024
Apr. 30, 2023
Debt Instrument [Line Items]      
Short-term borrowings   $ 3,099,000 $ 3,587,000
International Subsidiaries      
Debt Instrument [Line Items]      
Short-term borrowings   99,000 39,000
Term Loan B | Expiration Date, Period One      
Debt Instrument [Line Items]      
Bank Guarantees outstanding to customers   7,100,000 5,200,000
Term Loan B | Expiration Date, Period Two      
Debt Instrument [Line Items]      
Bank Guarantees outstanding to customers   435,000 142,000
Term Loan B | Expiration Date, Period Three      
Debt Instrument [Line Items]      
Bank Guarantees outstanding to customers   226,000 3,000
Term Loan B | Expiration Date, Period Four      
Debt Instrument [Line Items]      
Bank Guarantees outstanding to customers     233,000
Revolving Credit Facility | Credit Agreement, Mid Cap Funding IV Trust | Line of Credit      
Debt Instrument [Line Items]      
Loan agreement $ 15,000,000    
Credit facility outstanding   3,000,000 3,548,000
Unused and available credit facility   $ 11,587,000 $ 10,286,000
Interest rate at period end   9.54% 9.02%
Additional tranche available, minimum amount 1,000,000    
Maximum borrowing availability $ 30,000,000    
Revolving Credit Facility | Secured Overnight Financing Rate (SOFR) | Credit Agreement, Mid Cap Funding IV Trust | Line of Credit      
Debt Instrument [Line Items]      
Debt, variable interest rate 4.10%