Consolidated Balance Sheets (USD $)	Aug. 31, 2011	Nov. 30, 2010
Current Assets
Cash and cash equivalents	$ 7,679,011	$ 8,064,255
Short-term investments and marketable securities	2,346,122	4,673,848
Accounts receivable, net of allowances of $1,777,106 and $1,263,250, respectively	8,011,570	5,990,010
Inventories, net of reserve for inventory obsolescence of $813,217 and $1,372,798, respectively	9,146,439	9,077,234
Insurance claim receivable	0	361,639
Prepaid expenses and sundry receivables	591,714	976,108
Prepaid income taxes	973,841	999,702
Deferred income taxes	1,491,948	1,755,783
Total Current Assets	30,240,645	31,898,579
Property and Equipment, net of accumulated depreciation and amortization	542,525	550,689
Intangible Assets, net of accumulated amortization	673,233	673,580
Other Assets
Marketable securities	3,114,663	3,124,051
Other	52,800	65,300
Total Other Assets	3,167,463	3,189,351
Total Assets	34,623,866	36,312,199
Current Liabilities
Accounts payable and accrued liabilities	7,777,273	8,506,279
Capitalized lease obligation - current portion	6,180	15,197
Income taxes payable	22,500	0
Dividends payable	493,811	493,811
Total Current Liabilities	8,299,764	9,015,287
Deferred tax liability	146,677	118,717
Capitalized lease obligations-long term	3,135	8,149
Total Liabilities	8,449,576	9,142,153
Shareholders' Equity
Preferred stock, $1.00 par; authorized 20,000,000 shares; none issued	0	0
Common stock value	60,867	60,867
Additional paid-in capital	2,329,049	2,329,049
Retained earnings	23,820,172	24,806,474
Unrealized (loss) on marketable securities	(45,475)	(36,021)
Total Shareholders' Equity	26,174,290	27,170,046
Total Liabilities and Shareholders' Equity	34,623,866	36,312,199
Common Class A [Member]
Shareholders' Equity
Common stock value	$ 9,677	$ 9,677