Note 11 - Capital Stock and Stock Compensation - Changes in Non-vested Options (Details) - Restricted Stock [Member]	12 Months Ended
	Nov. 27, 2021 $ / shares shares
Non-vested restricted shares, outstanding, balance (in shares) | shares	34,500
Non-vested restricted shares, outstanding, balance (in dollars per share) | $ / shares	$ 33.58
Granted (in shares) | shares	7,105
Granted (in dollars per share) | $ / shares	$ 24.63
Vested (in shares) | shares	(31,000)
Vested (in dollars per share) | $ / shares	$ 35.75
Forfeited (in shares) | shares	0
Forfeited (in dollars per share) | $ / shares	$ 0
Non-vested restricted shares, outstanding, balance (in shares) | shares	10,605
Non-vested restricted shares, outstanding, balance (in dollars per share) | $ / shares	$ 21.24