STOCK-BASED COMPENSATION - Restricted Stock Unit and Performance-based Restricted Stock Unit - General Information (Details)	12 Months Ended
May 31, 2020
Stock-based Compensation
Performance period	3 years
Restricted Stock Units (RSUs) \| Share-based Payment Arrangement, Employee
Stock-based Compensation
Vesting period	3 years
Restricted Stock Units (RSUs) \| Share-based Payment Arrangement, Nonemployee
Stock-based Compensation
Vesting period	1 year
Performance shares
Stock-based Compensation
Awards earned rate, low end of range (as a percent)	0.00%
Awards earned rate, high end of range (as a percent)	200.00%

Share-based Compensation Arrangement by Share-based Payment Award, Description, Awards Earned Rate, High End of Range

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Description, Awards Earned Rate, Low End of Range

+ References

No definition available.

+ Details

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- References

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+ Details

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

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