Note 3 - Net Income (Loss) Per Share of Common Stock (Detail) - Earnings Per Share, Basic And Diluted (USD $)	3 Months Ended		9 Months Ended
	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2012	Aug. 31, 2011
Numerator: Net income (in Dollars)	$ 979,451	$ 1,019,840	$ 2,108,929	$ 826,002
Average number of common shares outstanding	4,035,852	4,019,874	4,031,828	4,016,039
Effect of dilutive stock options (in Dollars)	$ 16,394	$ 22,261	$ 17,408	$ 33,667
Denominator: Dilutive average number of common shares outstanding	4,052,246	4,042,135	4,049,236	4,049,706
Diluted earnings per common share (in Dollars per share)	$ 0.24	$ 0.25	$ 0.52	$ 0.20
Basic earnings per common share (in Dollars per share)	$ 0.24	$ 0.25	$ 0.52	$ 0.21