Note 14 - Equity Incentive Plan and Stock Based Compensation - Summary of Stock-based Compensation Expense (Details) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2022	Aug. 31, 2021
Stock-based compensation expense	$ 66,826	$ 61,446	$ 224,291	$ 203,245
Treasury share repurchase expense	0	0	(92,432)	(30,471)
Stock-based compensation expense net of treasury repurchases	$ 66,826	$ 61,446	$ 131,859	$ 172,774