Consolidated Statements of Changes in Stockholders' Equity (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance at Feb. 28, 2009	$ 179,696	$ 7,311,280	$ 5,751,017
Balance at beginning of year (in Shares) at Feb. 28, 2009	5,989,858
Net income			3,580,077	3,580,077
Cash dividends declared			(2,407,167)
Issuance of common stock	120	21,080
Exercise of stock options, vesting of restricted stock units and other	992	294,242
Total Stockholders’ Equity	180,808	7,626,602	6,923,927	14,731,337
Issuance of common stock (in Shares)	4,000
Exercise of stock options, vesting of restricted stock units and other (in Shares)	33,080
Balance at Feb. 28, 2010	180,808	7,626,602	6,923,927	14,731,337
Balance at end of year (in Shares) at Feb. 28, 2010	6,026,938
Net income			3,910,841	3,910,841
Cash dividends declared			(2,422,793)
Issuance of common stock	120	37,880
Exercise of stock options, vesting of restricted stock units and other	1,171	384,364
Tax benefit from employee stock transactions		11,195
Total Stockholders’ Equity	182,099	8,060,041	8,411,975	16,654,115
Issuance of common stock (in Shares)	4,000
Exercise of stock options, vesting of restricted stock units and other (in Shares)	39,038
Balance at Feb. 28, 2011	182,099	8,060,041	8,411,975	16,654,115
Balance at end of year (in Shares) at Feb. 28, 2011	6,069,976
Net income			3,876,032	3,876,032
Cash dividends declared			(2,449,802)
Issuance of common stock	120	41,200
Exercise of stock options, vesting of restricted stock units and other	2,653	586,540
Tax benefit from employee stock transactions		24,962
Total Stockholders’ Equity	184,872	8,712,743	9,838,205	18,735,820
Issuance of common stock (in Shares)	4,000
Exercise of stock options, vesting of restricted stock units and other (in Shares)	88,413
Balance at Feb. 29, 2012	$ 184,872	$ 8,712,743	$ 9,838,205	$ 18,735,820
Balance at end of year (in Shares) at Feb. 29, 2012	6,162,389