v3.26.1
Debt and Lines of Credit - Additional Information (Details)
3 Months Ended
Oct. 12, 2018
USD ($)
Apr. 30, 2026
USD ($)
Bank
Subsidiary
Apr. 30, 2025
USD ($)
Subsidiary
Bank
Apr. 30, 2026
CHF (SFr)
Subsidiary
Bank
Apr. 30, 2025
CHF (SFr)
Subsidiary
Bank
Debt Instrument [Line Items]          
Cash paid for interest   $ 100,000 $ 100,000    
Unsecured Debt | Swiss subsidiary          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity   8,300,000 7,900,000 SFr 6,500,000 SFr 6,500,000
Outstanding borrowing amount   0 0    
Revolving Credit Facility | Secured Debt | Credit Agreement Due on October 28, 2026          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity $ 100,000,000        
Uncommitted increase to borrowing capacity $ 50,000,000        
Credit facility matures date Oct. 28, 2026        
Loan drawn under the facility   0 0    
Line of credit facility remaining borrowing capacity   99,700,000 99,700,000    
Weighted average borrowings amount   $ 0 0    
Letter of Credit          
Debt Instrument [Line Items]          
Credit facility matures date   Apr. 27, 2027      
Outstanding borrowing amount   $ 300,000 $ 300,000    
Letter of Credit | Secured Debt | Credit Agreement Due on October 28, 2026          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity $ 15,000,000        
Letter of Credit | Unsecured Debt | Swiss subsidiary          
Debt Instrument [Line Items]          
Number of European banks guaranteed obligations to third parties | Bank   2 2 2 2
Number of foreign subsidiaries under guaranteed obligation | Subsidiary   2 2 2 2
Guaranteed obligations to third parties   $ 1,600,000 $ 1,500,000    
Restricted deposits related to lease agreements   $ 800,000 $ 800,000    
Swingline | Secured Debt | Credit Agreement Due on October 28, 2026          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity 25,000,000        
Swiss Borrowers | Secured Debt | Credit Agreement Due on October 28, 2026          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity $ 75,000,000