Consolidated Statements of Stockholders' Equity (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance, December 1, 2009 at Nov. 30, 2009	$ 39,904	$ 2,219,286	$ 10,408,228	$ 12,667,418
Balance, December 1, 2009 (in Shares) at Nov. 30, 2009	3,990,352
Exercise of stock options	180	81,060		81,240
Exercise of stock options (in Shares)	18,000
Stock based compensation		28,322		28,322
Dividends paid			(240,020)	(240,020)
Net income			1,053,497	1,053,497
Balance at Nov. 30, 2010	40,084	2,328,668	11,221,705	13,590,457
Balance (in Shares) at Nov. 30, 2010	4,008,352			4,008,352
Exercise of stock options	175	74,254		74,429
Exercise of stock options (in Shares)	17,500
Stock based compensation		58,311		58,311
Dividends paid			(241,551)	(241,551)
Net income			1,248,895	1,248,895
Balance at Nov. 30, 2011	$ 40,259	$ 2,461,233	$ 12,229,049	$ 14,730,541
Balance (in Shares) at Nov. 30, 2011	4,025,852			4,025,852