Note 5 - Stock Plans (Detail) - A summary of the activity of the Company's stock option plans (USD $)	12 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
Outstanding	1,432,083	1,506,967		1,289,842
Outstanding (in Dollars per share)	$ 10.60	$ 9.91		$ 9.87
Outstanding	5 years 36 days	6 years 21 days	6 years 237 days	7 years 14 days
Outstanding (in Dollars)	$ 4,866,334	$ 6,375,489		$ 677,650
Exercisable at June 30, 2012	1,196,165
Exercisable at June 30, 2012 (in Dollars per share)	$ 10.49
Exercisable at June 30, 2012	4 years 255 days
Exercisable at June 30, 2012 (in Dollars)	7,045,810
Granted		87,500	244,000
Granted (in Dollars per share)		$ 14.42	$ 9.84
Forfeited or expired	(12,560)	(52,751)	(12,750)
Forfeited or expired (in Dollars per share)	$ 11.21	$ 9.62	$ 10.16
Exercised	(57,233)	(109,633)	(14,125)
Exercised (in Dollars per share)	$ 9.58	$ 4.74	$ 4.04
Outstanding	1,362,290	1,432,083	1,506,967
Outstanding (in Dollars per share)	$ 10.63	$ 10.60	$ 9.91
Outstanding	5 years 36 days	6 years 21 days	6 years 237 days	7 years 14 days
Outstanding (in Dollars)	$ 7,829,713	$ 4,866,334	$ 6,375,489

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.

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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.

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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.

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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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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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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.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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Number of share options (or share units) exercised during the current period.

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