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Note 10 - Share-based Compensation (Tables) | 12 Months Ended
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Jun. 30, 2017
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Volatility |  |  | 36.8 | % |  |  | 48.1 | % |  |  | 52.9 | %
Risk-free rate of return |  |  | 1.03 | % |  |  | 1.93 | % |  |  | 2.03 | %
Dividend yield |  |  | 1.96 | % |  |  | 1.95 | % |  |  | 2.09 | %
Expected average life (years) |  |  | 5.0 |  |  |  | 6.3 |  |  |  | 6.7 |
Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Weighted |  |  |  |  |
|  |  |  |  |  | Weighted |  |  | Average |  |  |  |  |
|  |  |  |  |  | Average |  |  | Remaining |  |  |  |  |
|  |  |  |  |  | Exercise |  |  | Contractual |  |  | Aggregate |
Options |  | Shares |  |  | Price |  |  | Term (yrs) |  |  | Intrinsic Value |
Outstanding - June 30, 2016 |  |  | 907,073 |  |  | $ | 24.08 |  |  |  |  |  |  |  |  |
Granted |  |  | 20,153 |  |  |  | 34.73 |  |  |  |  |  |  |  |  |
Exercised |  |  | (58,450 | ) |  |  | 20.51 |  |  |  |  |  |  |  |  |
Canceled (forfeited/expired) |  |  | (32,756 | ) |  |  | 28.77 |  |  |  |  |  |  |  |  |
Outstanding - June 30, 2017 |  |  | 836,020 |  |  |  | 24.41 |  |  |  | 4.2 |  |  | $ | 6,900,417 |
Exercisable - June 30, 2017 |  |  | 550,736 |  |  | $ | 23.33 |  |  |  | 2.4 |  |  | $ | 5,201,916 |
Schedule of Nonvested Share Activity [Table Text Block] |
|  |  |  |  |  | Weighted Average |
Options |  | Shares |  |  | Grant Date Fair Value |
Nonvested June 30, 2016 |  |  | 353,702 |  |  | $ | 11.28 |
Granted |  |  | 20,153 |  |  |  | 8.30 |
Vested |  |  | (71,904 | ) |  |  | 10.67 |
Canceled (forfeited/expired) |  |  | (16,667 | ) |  |  | 11.25 |
Nonvested at June 30, 2017 |  |  | 285,284 |  |  | $ | 11.18 |
Schedule of Share-based Payment Award, Restricted Stock Units, Valuation Assumptions [Table Text Block] |
|  | 2017 |  |  | 2016 |
Volatility |  |  | 30.8 | % |  |  | 33.3 | %
Risk-free rate of return |  |  | 0.92 | % |  |  | 0.77 | %
Dividend yield |  |  | 1.97 | % |  |  | 1.99 | %
Expected average life (years) |  |  | 2.04 |  |  |  | 1.75 |
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  |  |  |  |  | Grant Date |
|  | Units |  |  | Fair Value |
Non-vested units at June 30, 2016 |  |  | 218,050 |  |  | $ | 24.53 |
Granted |  |  | 90,280 |  |  |  | 29.28 |
Vested |  |  | - |  |  |  | - |
Canceled (forfeited/expired) |  |  | - |  |  |  | - |
Non-vested units at June 30, 2017 |  |  | 308,330 |  |  |  | 25.92 |
Restricted Stock Units (RSUs) [Member] |
Notes Tables |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] |
Granted within fiscal years ending June 30, |  | 2017 |  |  | 2016 |
2016 |  | $ | 794 |  |  | $ | 733 |
2017 |  |  | 12 |  |  |  | - |
Total expense |  | $ | 806 |  |  | $ | 733 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of restricted stock units, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References No definition available. + Details
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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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