Note 7 - Net Income (Loss) Per Share of Common Stock - Basic and Diluted Earnings Per Common Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2024	Aug. 31, 2023	Aug. 31, 2024	Aug. 31, 2023
Numerator for basic and diluted net income (loss) per share:
Net income (loss) from continuing operations	$ 2,230	$ 240,873	$ (426,657)	$ 920,929
Net income (loss) from discontinued operations	(28,430)	(314,903)	(97,895)	(346,084)
Net loss	$ (26,200)	$ (74,030)	$ (524,552)	$ 574,845
Denominator:
For basic net income (loss) per share - weighted average common shares outstanding (in shares)	5,071,512	5,009,041	5,054,092	5,000,185
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)	5,071,512	5,009,041	5,054,092	5,000,185
Net Income (loss) per share - Basic:
Continuing Operations, basic (in dollars per share)	$ 0	$ 0.05	$ (0.08)	$ 0.18
Discontinued Operations, basic (in dollars per share)	(0.01)	(0.06)	(0.02)	(0.07)
Net loss per share (in dollars per share)	(0.01)	(0.01)	(0.1)	0.11
Net Income (loss) per share - Diluted:
Continuing Operations, diluted (in dollars per share)	0	0.05	(0.08)	0.18
Discontinued Operations, diluted (in dollars per share)	(0.01)	(0.06)	(0.02)	(0.07)
Net loss per share (in dollars per share)	$ (0.01)	$ (0.01)	$ (0.1)	$ 0.11