Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2016	Aug. 31, 2015
Income Statement [Abstract]
Net sales	$ 8,243,197	$ 8,349,329	$ 21,639,650	$ 22,428,219
Cost of goods sold	6,104,817	6,342,625	16,209,408	16,715,614
Gross profit	2,138,380	2,006,704	5,430,242	5,712,605
Operating expenses:
Selling and shipping expenses	657,093	591,208	1,848,239	1,758,278
General and administrative expenses	1,003,779	948,127	3,092,754	2,910,599
Depreciation and amortization	7,816	9,839	23,448	27,319
Total operating expenses	1,668,688	1,549,174	4,964,441	4,696,196
Income before other income (expense) and income taxes	469,692	457,530	465,801	1,016,409
Other income
Investment income	2,303	2,305	6,385	6,610
Other income	2,303	2,305	6,385	6,610
Income before income taxes	471,995	459,835	472,186	1,023,019
Income taxes	80,067	88,200	93,588	228,383
Net income	391,928	371,635	378,598	794,636
Dividends on preferred stock	2,500	2,500	7,500	7,500
Net income available to common shareholders	$ 389,428	$ 369,135	$ 371,098	$ 787,136
Net income per share available to common shareholders:
Basic	$ 0.04	$ 0.04	$ 0.04	$ 0.08
Diluted	$ 0.04	$ 0.04	$ 0.04	$ 0.08
Weighted Shares Outstanding:
Basic	10,089,131	9,982,384	10,031,192	9,522,782
Diluted	10,205,579	10,101,576	10,147,640	9,642,124