Note 7 - Stock Options: (Detail) - Summary of the range of exercise prices for stock options outstanding and exercisable Directors Plans: (USD $)	12 Months Ended
Sep. 30, 2012
Exercise Price - Min	$ 2.925
Weighted Average Remaining Life	10 years
Price Range $2.925 To $5.25 [Member]
Exercise Price - Min	$ 2.925
Exercise Price - Max	$ 5.25
Outstanding Stock Options (in Shares)	23,000
Weighted Average Exercise Price	$ 3.43
Weighted Average Remaining Life	6 years 6 months
Number of Stock Options Exercisable (in Shares)	12,667
Weighted Average Exercise Price	$ 3.84
Price Range $6.00 To $7.25 [Member]
Exercise Price - Min	$ 6.00
Exercise Price - Max	$ 7.25
Outstanding Stock Options (in Shares)	11,000
Weighted Average Exercise Price	$ 6.46
Weighted Average Remaining Life	4 years 6 months
Number of Stock Options Exercisable (in Shares)	9,333
Weighted Average Exercise Price	$ 6.55
Price Range $10.50 To $11.00 [Member]
Exercise Price - Min	$ 10.50
Exercise Price - Max	$ 11.00
Outstanding Stock Options (in Shares)	8,000
Weighted Average Exercise Price	$ 10.75
Weighted Average Remaining Life	5 years
Number of Stock Options Exercisable (in Shares)	8,000
Weighted Average Exercise Price	$ 10.75
Total [Member]
Outstanding Stock Options (in Shares)	42,000
Weighted Average Exercise Price	$ 5.62
Number of Stock Options Exercisable (in Shares)	30,000
Weighted Average Exercise Price	$ 6.52

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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