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Earnings (Loss) Per Share (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2019	May 31, 2021	May 31, 2020
Earnings (Loss) Per Share (Details) [Line Items]
Number of potentially antidilutive shares outstanding		2.0
Options outstanding ( in shares)		4,987,262	3,002,981
Participating Restricted Stock Units [Member]
Earnings (Loss) Per Share (Details) [Line Items]
Undistributed Earnings Allocated to Participating Securities (in Dollars)	$ 0.1

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Share-based Compensation Arrangement by Share-based Payment Award, Antidilutive Securities Outstanding, Amount

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Number of options outstanding, including both vested and non-vested options.

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Amount of undistributed earnings (loss) allocated to participating securities for the diluted earnings (loss) per share or per unit calculation under the two-class method.

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