Note 9 - Stock Options (Details) - USD ($)	12 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Outstanding at (in shares)	2,677,436	2,677,464	2,341,150
Outstanding at (in dollars per share)	$ 8.85	$ 9.57	$ 9.95
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	6 years 219 days	6 years 36 days	5 years 146 days	5 years 219 days
Outstanding at	$ 8,338,974	$ 4,914,601	$ 1,674,010	$ 1,544,896
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	1,026,800	734,323	436,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 9.39	$ 6.83	$ 7.24
Forfeitures (in shares)	(165,800)	(571,275)	(39,050)
Forfeitures (in dollars per share)	$ 15.15	$ 10.26	$ 11.59
Exercised (in shares)	(561,946)	(163,076)	(60,636)
Exercised (in dollars per share)	$ 7.34	$ 6.70	$ 6.22
Outstanding at (in shares)	2,976,490	2,677,436	2,677,464	2,341,150
Outstanding at (in dollars per share)	$ 8.97	$ 8.85	$ 9.57	$ 9.95
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	1,312,985	1,597,238	1,874,326
Exercisable at (in dollars per share)	$ 9.75	$ 10.18	$ 10.74
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	4 years	4 years 109 days	4 years
Exercisable at	$ 3,819,127	$ 2,250,093	$ 750,925

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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-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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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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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.

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

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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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Number of options outstanding, including both vested and non-vested options.

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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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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 could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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

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