Note 13 - Leases (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2021	Aug. 31, 2020
Sales-type Lease, Lease Income, Total	$ 0	$ 0	$ 0	$ 0
Lease, Cost, Total	$ 5,547	4,208	$ 17,536	17,840
Operating Lease, Weighted Average Remaining Lease Term (Month)	51 months		51 months
Operating Lease, Weighted Average Discount Rate, Percent	5.50%		5.50%
Finance Lease, Right-of-Use Asset, Amortization	$ 357	$ 0	$ 477	0
Finance Lease, Interest Expense	$ 87		$ 116	$ 0
Lessee, Finance Lease, Term of Contract (Month)	59 months		59 months
Lessee, Finance Lease, Discount Rate	4.75%		4.75%