Note 12 - Stockholders' Equity - Dividends Declared (Details) - USD ($)	3 Months Ended
Feb. 28, 2019	Nov. 30, 2018	Feb. 28, 2018	Nov. 30, 2017
Dividends Per Share of Common Stock (in dollars per share)	$ 0.64	$ 0.64	$ 0.56	$ 0.56
Record Date	Feb. 28, 2019	Nov. 30, 2018	Feb. 28, 2018	Nov. 30, 2017
Total $ Amount	$ 24,385	$ 24,372	$ 21,799	$ 21,901
Payment Date	Mar. 19, 2019	Dec. 18, 2018	Mar. 20, 2018	Dec. 19, 2017

Date the declared dividend will be paid, in CCYY-MM-DD format.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

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Amount of paid and unpaid cash dividends declared for classes of stock, for example, but not limited to, common and preferred.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

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