Note 3 - Financial Instruments and Investments (Details Textual) - USD ($) $ in Thousands |
9 Months Ended | |
|---|---|---|
Aug. 29, 2026 |
Nov. 29, 2025 |
|
| Short-Term Investments | $ 18,023 | $ 17,963 |
| Certificates of Deposit, Average Term | 7 months | |
| Minimum [Member] | ||
| Interest Rate of Certificates of Deposit | 2.00% | |
| Maximum [Member] | ||
| Interest Rate of Certificates of Deposit | 4.10% | |
| Weighted Average [Member] | ||
| Interest Rate of Certificates of Deposit | 3.80% | |
| Certificates of Deposit Terms (Year) | 5 years |