Note 7 - Net Income (Loss) Per Share of Common Stock - Basic and Diluted Earnings Per Common Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2024	May 31, 2023
Numerator for basic and diluted net income (loss) per share:
Net income (loss) from continuing operations	$ (4,657)	$ 329,761	$ (428,915)	$ 680,056
Net income (loss) from discontinued operations	(28,683)	(23,097)	(69,465)	(31,182)
Net income (loss)	$ (33,340)	$ 306,664	$ (498,380)	$ 648,874
Denominator:
For basic net income (loss) per share - weighted average common shares outstanding (in shares)	5,067,742	5,014,050	5,045,334	4,995,708
Effect of dilutive stock options (in shares)	0	0	0	0
For diluted net income (loss) per share - weighted average common shares outstanding (in shares)	5,067,742	5,014,050	5,045,334	4,995,708
Net Income (loss) per share - Basic:
Continuing Operations, basic (in dollars per share)	$ (0)	$ 0.07	$ (0.09)	$ 0.14
Discontinued Operations, basic (in dollars per share)	(0.01)	(0.01)	(0.01)	(0.01)
Net income (loss) per share, basic (in dollars per share)	(0.01)	0.06	(0.1)	0.13
Net Income (loss) per share - Diluted:
Continuing Operations, diluted (in dollars per share)	(0)	0.07	(0.09)	0.14
Discontinued Operations, diluted (in dollars per share)	(0.01)	(0.01)	(0.01)	(0.01)
Net income (loss) per share, diluted (in dollars per share)	$ (0.01)	$ 0.06	$ (0.1)	$ 0.13