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Note 9 - Share-based Compensation - Other PSU-related Information (Details) - USD ($) shares in Thousands, $ in Thousands	6 Months Ended		12 Months Ended
	May 31, 2017	May 31, 2016	Nov. 30, 2016
Total fair value of common shares issued	$ 5,777		$ 5,988
Performance Share Units [Member]
Performance multiplier on PSUs vested	113.00%	140.00%
Common shares issued (thousands) (in shares)	1,556	2,526
Total fair value of common shares issued	$ 4,506	$ 5,704

X

- Definition

Represents the performance multiplier on share-based payment awards vested during the period, other than options.

+ References

No definition available.

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X

- Definition

Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

+ References

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- Definition

Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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