Note 6 - Stock Compensation Expense (Details) - Summary of Options Currently Outstanding and Exercisable (USD $)	3 Months Ended
Dec. 31, 2013
Price Range 5.47 To 5.72 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	$ 5.72
Number - Outstanding (in Shares)	525,203
Wtd. Avg. Remaining Life (years) - Outstanding	6 years
Wtd. Avg. Exercise Price - Outstanding	$ 5.71
Aggregate Intrinsic Value - Outstanding (in Dollars)	$ 5,800,489
Number - Exercisable (in Shares)	200,203
Wtd. Avg. Remaining Life (years) - Exercisable	5 years
Wtd. Avg. Exercise Price - Exercisable	$ 5.68
Aggregate Intrinsic Value - Exercisable (in Dollars)	2,174,377
Price Range 5.47 To 5.72 [Member] \| Minimum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	$ 5.47
Price Range 7.09 To 8.60 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	$ 8.60
Number - Outstanding (in Shares)	141,338
Wtd. Avg. Remaining Life (years) - Outstanding	4 years
Wtd. Avg. Exercise Price - Outstanding	$ 7.92
Aggregate Intrinsic Value - Outstanding (in Dollars)	1,248,156
Number - Exercisable (in Shares)	110,088
Wtd. Avg. Remaining Life (years) - Exercisable	3 years
Wtd. Avg. Exercise Price - Exercisable	$ 7.92
Aggregate Intrinsic Value - Exercisable (in Dollars)	904,468
Price Range 7.09 To 8.60 [Member] \| Minimum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	$ 7.09
Price Range 11.94 To 15.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	$ 15.99
Number - Outstanding (in Shares)	90,000
Wtd. Avg. Remaining Life (years) - Outstanding	2 years
Wtd. Avg. Exercise Price - Outstanding	$ 13.55
Aggregate Intrinsic Value - Outstanding (in Dollars)	288,225
Number - Exercisable (in Shares)	90,000
Wtd. Avg. Remaining Life (years) - Exercisable	2 years
Wtd. Avg. Exercise Price - Exercisable	$ 13.55
Aggregate Intrinsic Value - Exercisable (in Dollars)	288,225
Price Range 11.94 To 15.99 [Member] \| Minimum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	$ 11.94
Price Range 31.07 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	$ 31.07
Number - Outstanding (in Shares)	45,000
Wtd. Avg. Remaining Life (years) - Outstanding	3 years
Wtd. Avg. Exercise Price - Outstanding	$ 31.07
Number - Exercisable (in Shares)	45,000
Wtd. Avg. Remaining Life (years) - Exercisable	3 years
Wtd. Avg. Exercise Price - Exercisable	$ 31.07
Price Range 5.47 To 31.07 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	$ 31.07
Number - Outstanding (in Shares)	801,541
Aggregate Intrinsic Value - Outstanding (in Dollars)	7,336,870
Number - Exercisable (in Shares)	445,291
Aggregate Intrinsic Value - Exercisable (in Dollars)	$ 3,367,070
Price Range 5.47 To 31.07 [Member] \| Minimum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	$ 5.47

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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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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)

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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.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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

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-Publisher FASB

-Name Accounting Standards Codification

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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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

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-Publisher FASB

-Name Accounting Standards Codification

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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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.

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-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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