Note 17 - Share-based Compensation - Stock Options, Valuation Assumptions (Details) - Share-Based Payment Arrangement, Nonemployee [Member] - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2023 |
Jun. 30, 2022 |
Jun. 30, 2021 |
|
| Volatility | 41.60% | 39.30% | 38.20% |
| Risk-free rate of return | 2.92% | 0.73% | 0.35% |
| Dividend yield | 4.25% | 3.79% | 3.26% |
| Expected average life (years) (Year) | 4 years 10 months 24 days | 5 years 6 months | 5 years 6 months |
| Grant date fair value (in dollars per share) | $ 5.98 | $ 5.04 | $ 3.20 |
| Fair value as a % of exercise price | 23.90% | 21.30% | 24.70% |
| X | ||||||||||
- Definition The Fair Value as a percent of exercise price for share based payment awards. No definition available.
|
| X | ||||||||||
- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|