Note 10 - Share-based Employee Compensation - Weighted Average Assumptions Used in Estimating Fair Value of Option Grant (Details) - Black Scholes Option-pricing Model [Member] |
12 Months Ended | |
|---|---|---|
Jun. 06, 2017 |
Jun. 02, 2015 |
|
| Risk-free interest rate | 1.08% | 1.48% |
| Expected dividend yield | 0.00% | 0.00% |
| Expected stock price volatility | 41.19% | 44.27% |
| Expected life (in years) (Year) | 4 years 124 days | 4 years 182 days |