Note 3 - Basic and Diluted Earnings Per Common Share (Details) - USD ($)	3 Months Ended
	Feb. 29, 2016	Feb. 28, 2015
Basic:
Numerator: net income	$ 80,962	$ 168,195
Denominator: average number of common shares outstanding (in shares)	4,074,338	4,050,507
Basic earnings per common share (in dollars per share)	$ 0.02	$ 0.04
Diluted:
Numerator: net income	$ 80,962	$ 168,195
Denominator: average number of common shares outstanding (in shares)	4,074,338	4,050,507
Effect of dilutive stock options (in shares)	0	1,247
Denominator: dilutive average number of common shares outstanding (in shares)	4,074,338	4,051,754
Diluted earnings per common share (in dollars per share)	$ 0.02	$ 0.04