Note 4 - Financial Instruments, Investments and Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2024	Nov. 25, 2023	Nov. 30, 2023
Short-Term Investments	$ 20,360	$ 17,775	$ 20,360
Investment, Type [Extensible Enumeration]		Certificates of Deposit [Member]	Certificates of Deposit [Member]
Interest Rate of Certificates of Deposit	2.00%
Certificates of Deposit Terms (Month)	6 months
Certificates of Deposit [Member]
Short-Term Investments	$ 2,500
Minimum [Member]
Certificates of Deposit, Average Term		6 months
Interest Rate of Certificates of Deposit		0.70%
Maximum [Member]
Certificates of Deposit, Average Term		12 months
Interest Rate of Certificates of Deposit		5.28%
Weighted Average [Member]
Interest Rate of Certificates of Deposit		4.30%