Note 2 - Stock-based Compensation (Details Textual) - USD ($) |
Jun. 30, 2016 |
Jun. 30, 2015 |
---|---|---|
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $ 0 | $ 0 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares | 0 | 0 |