Note 5 - 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, 2023	May 31, 2022	May 31, 2023	May 31, 2022
Numerator for basic and diluted net income (loss) per share:
Net income (loss)	$ 306,664	$ 175,353	$ 648,874	$ (231,136)
Denominator:
For basic net income (loss) per share - weighted average common shares outstanding (in shares)	5,014,050	4,629,331	4,995,708	4,599,743
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)	5,014,050	4,629,331	4,995,708	4,599,743
Net Income (Loss) per share - Basic:
Net Income (Loss) per share (in dollars per share)	$ 0.06	$ 0.04	$ 0.13	$ (0.05)
Net Income (Loss) per share - Diluted:
Net Income (Loss) per share (in dollars per share)	$ 0.06	$ 0.04	$ 0.13	$ (0.05)