Note 3 - Uncertain Tax Liability (Details) - USD ($)	12 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Beginning balance	$ 3,244,000
Added liability for the prior year		$ 2,393,000
Added liability for the current year		$ 851,000
Tax payment upon settlement
Reduced liability for the current year	$ (253,000)
Ending balance	$ 2,991,000	$ 3,244,000

Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Unrecognized Tax Benefit
-URI http://asc.fasb.org/extlink&oid=6527854

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Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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