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Note 18 - Subsequent Events (Details Textual) - $ / shares						12 Months Ended
	Oct. 24, 2018	Jul. 25, 2018	Apr. 25, 2018	Jan. 24, 2018	Nov. 20, 2017	Aug. 31, 2018	Aug. 31, 2017
Common Stock, Dividends, Per Share, Declared		$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.40	$ 0
Subsequent Event [Member]
Common Stock, Dividends, Per Share, Declared	$ 0.12

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: 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

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: