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Note 11 - Treasury Stock and Repurchase Program (Details Textual) - USD ($)			1 Months Ended					9 Months Ended
		Oct. 30, 2018	Jul. 31, 2019	Jun. 30, 2019	May 31, 2019	Jan. 30, 2012	Jan. 31, 2011	Jul. 30, 2019	Oct. 19, 2018
Treasury Stock, Shares, Acquired	[1]			1,448	2,409
October 2018 Share Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount		$ 2,000,000							$ 2,000,000
Treasury Stock, Shares, Acquired								25,773
Former Repurchase Program [Member]
Treasury Stock, Shares, Acquired						85,219
January 2011 Share Repurchase Program [Member]
Treasury Stock, Shares, Acquired							18,400
September 2012 Share Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount		$ 3,000,000
Treasury Stock, Shares, Acquired		207,047
[1] Includes 207,047 shares that were acquired during the $3 million repurchase program which was authorized in September 2012 and expired in October 2018.

X

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

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

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-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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- Details

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