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Note 10 - Equity Compensation (Tables) | 9 Months Ended
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Mar. 31, 2018
Notes Tables |
Stock Warrants, Valuation Assumptions [Table Text Block] |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | March 31 |  |  | March 31 |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Dividend yield |  |  | -- |  |  |  | 1.93 | % |  |  | 3.35 | % |  |  | 1.85 | %
Expected volatility |  |  | -- |  |  |  | 41 | % |  |  | 41 | % |  |  | 42 | %
Risk-free interest rate |  |  | -- |  |  |  | 1.92 | % |  |  | 1.77 | % |  |  | 1.31 | %
Expected life (yrs.) |  |  | -- |  |  |  | 6.2 |  |  |  | 6.0 |  |  |  | 6.1 |
Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Nine Months Ended March 31, 2018 |
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value |
Outstanding at 6/30/17 |  |  | 3,119,688 |  |  | $ | 9.12 |  |  |  | 7.4 |  |  | $ | 2,332,224 |
Granted |  |  | 794,537 |  |  | $ | 5.98 |  |  |  |  |  |  |  |  |
Forfeitures |  |  | (493,609 | ) |  | $ | 11.34 |  |  |  |  |  |  |  |  |
Exercised |  |  | (42,939 | ) |  | $ | 6.66 |  |  |  |  |  |  |  |  |
Outstanding at 3/31/18 |  |  | 3,377,677 |  |  | $ | 8.09 |  |  |  | 7.2 |  |  | $ | 2,837,701 |
Exercisable at 3/31/18 |  |  | 1,586,881 |  |  | $ | 8.20 |  |  |  | 5.7 |  |  | $ | 988,080 |
|  | Nine Months Ended March 31, 2017 |
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value |
Outstanding at 6/30/16 |  |  | 2,976,490 |  |  | $ | 8.97 |  |  |  | 6.6 |  |  | $ | 8,338,974 |
Granted |  |  | 1,256,623 |  |  | $ | 10.67 |  |  |  |  |  |  |  |  |
Forfeitures |  |  | (161,812 | ) |  | $ | 16.17 |  |  |  |  |  |  |  |  |
Exercised |  |  | (440,146 | ) |  | $ | 7.39 |  |  |  |  |  |  |  |  |
Outstanding at 3/31/17 |  |  | 3,631,155 |  |  | $ | 9.43 |  |  |  | 7.4 |  |  | $ | 4,546,991 |
Exercisable at 3/31/17 |  |  | 1,423,528 |  |  | $ | 8.99 |  |  |  | 5.3 |  |  | $ | 2,912,714 |
Schedule of Nonvested Share Activity [Table Text Block] |
|  | Shares |  |  | Weighted-Average Grant Date Fair Value |
Unvested at June 30, 2017 |  |  | 1,842,127 |  |  | $ | 3.52 |
Granted |  |  | 794,537 |  |  | $ | 1.73 |
Vested |  |  | (640,984 | ) |  | $ | 3.51 |
Forfeited |  |  | (204,884 | ) |  | $ | 3.46 |
Unvested at March 31, 2018 |  |  | 1,790,796 |  |  | $ | 2.73 |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] |
|  | Shares |  |  | Weighted-Average Grant Date Fair Value |
Unvested at June 30, 2017 |  |  | 133,335 |  |  | $ | 10.38 |
Awarded |  |  | 91,490 |  |  | $ | 5.92 |
Vested |  |  | (43,803 | ) |  | $ | 10.32 |
Forfeited |  |  | (7,000 | ) |  | $ | 10.46 |
Unvested at March 31, 2018 |  |  | 174,022 |  |  | $ | 8.05 |

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