Consolidated Balance Sheets (Parenthetical) (USD $)	Aug. 31, 2011	Nov. 30, 2010
Current Assets
Allowance for doubtful accounts receivable	$ 1,777,106	$ 1,263,250
Reserve for inventory obsolescence	$ 813,217	$ 1,372,798
Shareholders' Equity
Preferred stock par value	$ 1.00	$ 1.00
Preferred stock shares authorized	20,000,000	20,000,000
Preferred stock shares issued	0	0
Common stock par value	$ 0.01	$ 0.01
Common stock shares authorized	15,000,000	15,000,000
Common stock shares issued	6,086,740	6,086,740
Common stock shares outstanding	6,086,740	6,086,740
Common Class A [Member]
Shareholders' Equity
Common stock par value	$ 0.01	$ 0.01
Common stock shares authorized	5,000,000	5,000,000
Common stock shares issued	967,702	967,702
Common stock shares outstanding	967,702	967,702