Note 9 - Share-based Compensation (Details Textual) |
9 Months Ended |
---|---|
Mar. 31, 2019
shares
| |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Contractual Term | 10 years |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 1,489,996 |
Restricted Stock [Member] | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 0 |