Note 3 - Net Income Per Share of Common Stock (Details) - Earnings Per Share, Basic and Diluted (USD $)	3 Months Ended		9 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2013	Aug. 31, 2012
Basic:
Numerator: net income (in Dollars)	$ 26,394	$ 979,451	$ 1,359,894	$ 2,108,929
Average number of common shares outstanding	4,041,682	4,035,852	4,038,118	4,031,828
Effect of dilutive stock options	16,091	16,394	12,701	17,408
Denominator: dilutive average number of common shares outstanding	4,057,773	4,052,246	4,050,819	4,049,236
Diluted earnings per common share (in Dollars per share)	$ 0.01	$ 0.24	$ 0.34	$ 0.52
Basic earnings per common share (in Dollars per share)	$ 0.01	$ 0.24	$ 0.34	$ 0.52