Note 3 - Basic and Diluted Earnings Per Common Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015
Basic:
Numerator: net income	$ (56,571)	$ 231,621	$ 24,401	$ 399,816
Denominator: average number of common shares outstanding (in shares)	4,101,810	4,060,775	4,088,073	4,055,698
Basic earnings per common share (in dollars per share)	$ (0.01)	$ 0.06	$ 0.01	$ 0.10
Diluted:
Numerator: net income	$ (56,571)	$ 231,621	$ 24,401	$ 399,816
Denominator: average number of common shares outstanding (in shares)	4,101,810	4,060,775	4,088,073	4,055,698
Effect of dilutive stock options (in shares)	0	1,519	0	1,375
Denominator: dilutive average number of common shares outstanding (in shares)	4,101,810	4,062,294	4,088,073	4,057,073
Diluted earnings per common share (in dollars per share)	$ (0.01)	$ 0.06	$ 0.01	$ 0.10