Note 12 - Capital Stock and Stock Compensation - Changes in Non-vested Options (Details) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Nov. 30, 2024	Nov. 25, 2023
Restricted shares outstanding (in shares)	94,409	92,313
Granted, grant date fair value (in dollars per share)	$ 16.62
January 12, 2022 [Member]
Restricted shares outstanding (in shares)	15,500
Granted, grant date fair value (in dollars per share)	$ 15.82
Original vesting period (Year)	3 years
Remaining restriction period (Year)	1 month 6 days
January 11 2023 [Member]
Restricted shares outstanding (in shares)	30,800
Granted, grant date fair value (in dollars per share)	$ 17.55
Original vesting period (Year)	3 years
Remaining restriction period (Year)	1 year 1 month 6 days
March 6 2024 [Member]
Restricted shares outstanding (in shares)	18,109
Granted, grant date fair value (in dollars per share)	$ 15.46
Original vesting period (Year)	1 year
Remaining restriction period (Year)	3 months 18 days
October 29 2024 [Member]
Restricted shares outstanding (in shares)	30,000
Granted, grant date fair value (in dollars per share)	$ 14.11
Original vesting period (Year)	3 years
Remaining restriction period (Year)	2 years 10 months 24 days