Stock-Based Compensation (Restricted Stock Award Activity) (Details) - Restricted Stock Awards [Member] |
9 Months Ended |
|---|---|
|
May 31, 2021
$ / shares
shares
| |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Restricted stock awards at August 31, 2020, Number of Shares | shares | 21,420 |
| Granted, Number of Shares | shares | 28,049 |
| Forfeited, Number of Shares | shares | |
| Vested, Number of Shares | shares | (21,420) |
| Restricted stock awards at May 31, 2021, Number of Shares | shares | 28,049 |
| Restricted stock awards at August 31, 2020, Weighted-Average Grant Date Fair Value Per Share | $ / shares | $ 32.68 |
| Granted, Weighted-Average Grant Date Fair Value Per Share | $ / shares | 24.96 |
| Forfeited, Weighted-Average Grant Date Fair Value Per Share | $ / shares | |
| Vested, Weighted-Average Grant Date Fair Value Per Share | $ / shares | 32.68 |
| Restricted stock awards at May 31, 2021, Weighted-Average Grant Date Fair Value Per Share | $ / shares | $ 24.96 |