Marketable Securities - Investment Income (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Apr. 30, 2024 |
Apr. 30, 2023 |
|
| Investments, Debt and Equity Securities [Abstract] | ||
| Interest income | $ 4,160 | $ 2,928 |
| Accretion/amortization of discount/premium, net | 487 | 471 |
| Investment income | $ 4,647 | $ 3,399 |
| X | ||||||||||
- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income and dividend income on nonoperating securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of accretion (amortization) of purchase discount (premium) on nonoperating securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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