Note 3 - 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, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Basic:
Numerator: net income	$ 231,621	$ 253,155	$ 399,816	$ (5,159)
Denominator: average number of common shares outstanding (in shares)	4,060,775	4,047,487	4,055,698	4,047,025
Basic earnings per common share (in dollars per share)	$ 0.06	$ 0.06	$ 0.10	$ 0
Diluted:
Numerator: net income	$ 231,621	$ 253,155	$ 399,816	$ (5,159)
Average number of common shares outstanding (in shares)	4,060,775	4,047,487	4,055,698	4,047,025
Effect of dilutive stock options (in shares)	1,519	6,260	1,375	0
Denominator: dilutive average number of common shares outstanding (in shares)	4,062,294	4,053,747	4,057,073	4,047,025
Diluted earnings per common share (in dollars per share)	$ 0.06	$ 0.06	$ 0.10	$ 0