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Investments (Details) - USD ($) | Apr. 30, 2024 | Jan. 31, 2024
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Disclosure Text Block Supplement [Abstract] |  |
Retained Earnings, Undistributed Earnings from Equity Method Investees | $ 16,600,000 | $ 14,900,000
Short-Term Investments | $ 120,564,000 | $ 155,260,000
Debt Securities, Held-to-Maturity, Weighted Average Yield, Maturity, Year One | 5.40% | 5.50%
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss | $ 80,000 | $ 94,000

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- Definition Weighted average yield of investment in debt security measured at amortized cost (held-to-maturity) maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph a -Subparagraph (1) -Publisher SEC + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5A + Details
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