Note 2 - Allowance for Doubtful Accounts - Activity in the Allowance for Doubtful Accounts (Details) - USD ($)	12 Months Ended
	Nov. 30, 2020	Nov. 30, 2019
Balance, beginning	$ 22,925	$ 25,100
Provision charged to expense	44,222	(1,602)
Less amounts charged-off	(15,972)	(573)
Balance, ending	$ 51,175	$ 22,925