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Consolidated Balance Sheets (Parentheticals) - $ / shares	May 31, 2021	May 31, 2020
Preferred stock, par value per share (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	2,000,000.0	2,000,000.0
Preferred stock issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common Stock
Common Stock, par value per share (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized (in shares)	70,000,000	70,000,000.0
Common Stock, shares issued	42,900,000	42,900,000
Common Stock, shares outstanding (in shares)	32,707,795	32,500,000
Class A Stock
Common Stock, par value per share (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized (in shares)	4,000,000	4,000,000.0
Common Stock, shares issued	1,700,000	1,700,000
Common Stock, shares outstanding (in shares)	1,656,200	1,700,000

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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