Debt and Lines of Credit - Additional Information (Details)		1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 12, 2018 USD ($)	Nov. 30, 2023 USD ($)	Oct. 31, 2024 USD ($) Bank Subsidiary	Oct. 31, 2023 USD ($) Subsidiary Bank	Oct. 31, 2024 USD ($) Bank Subsidiary	Oct. 31, 2023 USD ($) Subsidiary Bank	Oct. 31, 2024 CHF (SFr) Bank Subsidiary	Oct. 31, 2023 CHF (SFr) Subsidiary Bank
Debt Instrument [Line Items]
Cash paid for interest					$ 200,000	$ 200,000
Amortization of debt fees					200,000	200,000
Unsecured Debt | Swiss subsidiary
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 7,500,000	$ 7,100,000	7,500,000	7,100,000	SFr 6,500,000	SFr 6,500,000
Outstanding borrowing amount			0	0	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	0	0
Line of credit facility remaining borrowing capacity			99,700,000	99,700,000	99,700,000	99,700,000
Weighted average borrowings amount			0	0	$ 0	0
Letter of Credit
Debt Instrument [Line Items]
Credit facility matures date					Jun. 02, 2025
Outstanding borrowing amount			$ 300,000	$ 300,000	$ 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	2	2
Number of foreign subsidiaries under guaranteed obligation | Subsidiary			2	2	2	2	2	2
Guaranteed obligations to third parties			$ 1,400,000	$ 1,500,000	$ 1,400,000	$ 1,500,000
Restricted deposit relates to lease agreement			$ 800,000	$ 800,000	$ 800,000	$ 800,000
Refunded restricted deposit relates to lease agreement		$ 100,000
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