Note 2 - Allowance for Doubtful Accounts - Activity in the Allowance for Doubtful Accounts (Details) - USD ($)	12 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
Balance, beginning	$ 51,175	$ 22,925
Provision (recovery) charged to expense	(4,160)	44,222
Less amounts charged-off	(8,827)	(15,972)
Balance, ending	$ 38,188	$ 51,175