Note 5 - Employee Benefit Plans (Details Textual) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2016 |
Jun. 30, 2015 |
Jun. 30, 2014 |
|
| Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 50.00% | ||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Match | 50.00% | ||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 5.00% | ||
| Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage | 20.00% | ||
| Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 415,000 | $ 358,000 | $ 278,000 |