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Equity Compensation Plans and Other Incentive Compensation - Stock Option Activity (Detail) - $ / shares | 12 Months Ended
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May 31, 2025 | May 31, 2024 | May 31, 2023
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Options Outstanding, Beginning Balance | 4,936,000 | 4,222,000 | 3,244,000
Options, Granted | 2,002,000 | 1,949,000 | 1,704,000
Options, Exercised | (23,000) | (11,000) | (22,000)
Options, Forfeited | (988,000) | (1,224,000) | (704,000)
Options Outstanding, Ending Balance | 5,927,000 | 4,936,000 | 4,222,000
Weighted-Average Exercise Price, Beginning Balance | $ 20.41 | $ 25.56 | $ 32.13
Weighted-Average Exercise Price, Granted | 15.47 | 15.43 | 14.68
Weighted-Average Exercise Price, Exercised | 14.5 | 13.61 | 14.78
Weighted-Average Exercise Price, Forfeited | 27.92 | 30.27 | 29.81
Weighted-Average Exercise Price, Ending Balance | 17.51 | 20.41 | 25.56
Weighted-Average Grant Date Fair Value, Beginning Balance | 6.12 | 6.51 | 7.66
Weighted-Average Grant Date Fair Value, Granted | 4.96 | 5.98 | 4.61
Weighted-Average Grant Date Fair Value, Exercised | 4.59 | 4.44 | 4.23
Weighted-Average Grant Date Fair Value, Forfeited | 7.1 | 7.26 | 7.26
Weighted-Average Grant Date Fair Value, Ending Balance | $ 5.56 | $ 6.12 | $ 6.51

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- Definition Share Based Compensation Arrangement By Share Based Payment Award Options Exercised In Period Weighted Average Grant Date Fair Value + References No definition available. + Details
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- Definition Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Weighted Average Grant Date Fair Value + References No definition available. + Details
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- Definition Share Based Compensation Arrangement by Share Based Payment Award, Options, Weighted Average Grant Date Fair Value + References No definition available. + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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