Note 7 - Marketable Debt Securities (Details Textual) - USD ($) $ in Thousands |
9 Months Ended | |
|---|---|---|
Aug. 31, 2026 |
Aug. 31, 2025 |
|
| Proceeds from Sale and Maturity of Marketable Securities | $ 750 | $ 6,352 |
| Marketable Security, Gain (Loss) | 13 | $ (0) |
| Corporate Debt Securities [Member] | ||
| Proceeds from Sale and Maturity of Marketable Securities | 750 | |
| Marketable Security, Gain (Loss) | $ 100 | |