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Note 9 - Equity Compensation (Tables) | 12 Months Ended
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Jun. 30, 2018
Notes Tables |
Stock Warrants, Valuation Assumptions [Table Text Block] |
|  | February 21, |
|  | 2017 |
Dividend yield |  |  | 2.01 | %
Expected volatility |  |  | 39 | %
Risk-free interest rate |  |  | 1.80 | %
Expected life (in years) |  |  | 4.5 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Dividend yield |  |  | 3.3 | % |  |  | 1.9 | % |  |  | 1.3 | %
Expected volatility |  |  | 41 | % |  |  | 42 | % |  |  | 44 | %
Risk-free interest rate |  |  | 1.8 | % |  |  | 1.3 | % |  |  | 1.7 | %
Expected life (in years) |  |  | 6.0 |  |  |  | 6.0 |  |  |  | 6.0 |
Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Twelve Months Ended June 30, 2018 |
|  |  |  |  |  |  |  |  | Weighted |  |  |  |  |
|  |  |  |  |  | Weighted |  |  | Average |  |  |  |  |
|  |  |  |  |  | Average |  |  | Remaining |  |  | Aggregate |
|  |  |  |  |  | Exercise |  |  | Contractual Term |  |  | Intrinsic |
|  | Shares |  |  | Price |  |  | (in years) |  |  | Value |
Outstanding at 6/30/17 |  |  | 3,119,688 |  |  | $ | 9.12 |  |  |  | 7.4 |  |  | $ | 2,332,324 |
Granted |  |  | 794,537 |  |  | $ | 5.98 |  |  |  |  |  |  |  |  |
Exercised |  |  | (42,939 | ) |  | $ | 6.66 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (467,609 | ) |  | $ | 9.11 |  |  |  |  |  |  |  |  |
Expired |  |  | (105,000 | ) |  | $ | 19.62 |  |  |  |  |  |  |  |  |
Outstanding at 6/30/18 |  |  | 3,298,677 |  |  | $ | 8.06 |  |  |  | 7.0 |  |  | $ | 8,037 |
Exercisable at 6/30/18 |  |  | 1,824,552 |  |  | $ | 8.22 |  |  |  | 5.8 |  |  | $ | 39,011 |
|  | Twelve Months Ended June 30, 2017 |
|  |  |  |  |  |  |  |  | Weighted |  |  |  |  |
|  |  |  |  |  | Weighted |  |  | Average |  |  |  |  |
|  |  |  |  |  | Average |  |  | Remaining |  |  | Aggregate |
|  |  |  |  |  | Exercise |  |  | Contractual Term |  |  | Intrinsic |
|  | Shares |  |  | Price |  |  | (in years) |  |  | Value |
Outstanding at 6/30/16 |  |  | 2,976,490 |  |  | $ | 8.97 |  |  |  | 6.6 |  |  | $ | 8,338,974 |
Granted |  |  | 1,332,623 |  |  | $ | 10.59 |  |  |  |  |  |  |  |  |
Exercised |  |  | (486,446 | ) |  | $ | 7.37 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (702,979 | ) |  | $ | 12.46 |  |  |  |  |  |  |  |  |
Outstanding at 6/30/17 |  |  | 3,119,688 |  |  | $ | 9.12 |  |  |  | 7.4 |  |  | $ | 2,332,324 |
Exercisable at 6/30/17 |  |  | 1,277,561 |  |  | $ | 8.75 |  |  |  | 5.0 |  |  | $ | 1,592,653 |
|  | Twelve Months Ended June 30, 2016 |
|  |  |  |  |  |  |  |  |  | Weighted |  |  |  |  |
|  |  |  |  |  | Weighted |  |  | Average |  |  |  |  |
|  |  |  |  |  | Average |  |  | Remaining |  |  | Aggregate |
|  |  |  |  |  | Exercise |  |  | Contractual Term |  |  | Intrinsic |
|  | Shares |  |  | Price |  |  | (in years) |  |  | Value |
Outstanding at 6/30/15 |  |  | 2,677,436 |  |  | $ | 8.85 |  |  |  | 6.1 |  |  | $ | 4,914,601 |
Granted |  |  | 1,026,800 |  |  | $ | 9.39 |  |  |  |  |  |  |  |  |
Exercised |  |  | (561,946 | ) |  | $ | 7.34 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (165,800 | ) |  | $ | 15.15 |  |  |  |  |  |  |  |  |
Outstanding at 6/30/16 |  |  | 2,976,490 |  |  | $ | 8.97 |  |  |  | 6.6 |  |  | $ | 8,338,974 |
Exercisable at 6/30/16 |  |  | 1,312,985 |  |  | $ | 9.75 |  |  |  | 4.0 |  |  | $ | 3,819,127 |
Schedule of Nonvested Share Activity [Table Text Block] |
|  |  |  |  |  | Weighted-Average |
|  |  |  |  |  | Grant Date |
|  | Shares |  |  | Fair Value |
Unvested at June 30, 2017 |  |  | 1,842,127 |  |  | $ | 3.52 |
Granted |  |  | 794,537 |  |  | $ | 1.73 |
Vested |  |  | (942,905 | ) |  | $ | 3.39 |
Forfeited |  |  | (219,634 | ) |  | $ | 3.43 |
Unvested at June 30, 2018 |  |  | 1,474,125 |  |  | $ | 2.65 |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] |
|  |  |  |  |  | Weighted-Average |
|  |  |  |  |  | Grant Date |
|  | Shares |  |  | Fair Value |
Unvested at June 30, 2017 |  |  | 133,335 |  |  | $ | 10.38 |
Awarded |  |  | 91,490 |  |  | $ | 5.92 |
Vested |  |  | (43,803 | ) |  | $ | 10.32 |
Forfeited |  |  | (11,625 | ) |  | $ | 9.82 |
Unvested at June 30, 2018 |  |  | 169,397 |  |  | $ | 8.03 |

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