Note 9 - Stockholders' Equity - Cash Dividends Declared (Details) - $ / shares |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Feb. 28, 2026 |
Feb. 28, 2026 |
Feb. 28, 2025 |
Feb. 28, 2026 |
Feb. 28, 2025 |
|
| Amount, per share (in dollars per share) | $ 0.01 | $ 0.07 | $ 0.02 | $ 0.14 | |
| O 2026 Q1 Dividends [Member] | |||||
| Declaration date | Oct. 15, 2025 | ||||
| Amount, per share (in dollars per share) | $ 0.01 | ||||
| Record date | Oct. 29, 2025 | ||||
| Payable date | Nov. 12, 2025 | ||||
| O 2025 Q1 Dividends [Member] | |||||
| Declaration date | Oct. 16, 2024 | ||||
| Amount, per share (in dollars per share) | $ 0.07 | ||||
| Record date | Oct. 30, 2024 | ||||
| Payable date | Nov. 13, 2024 | ||||
| O 2025 Q2 Dividends [Member] | |||||
| Declaration date | Jan. 15, 2025 | ||||
| Amount, per share (in dollars per share) | $ 0.07 | ||||
| Record date | Jan. 29, 2025 | ||||
| Payable date | Feb. 12, 2025 | ||||
| O 2026 Q2 Dividends [Member] | |||||
| Declaration date | Jan. 14, 2026 | ||||
| Amount, per share (in dollars per share) | $ 0.01 | ||||
| Record date | Jan. 28, 2026 | ||||
| Payable date | Feb. 11, 2026 | ||||