Consolidated Statements of Changes in Stockholders' Equity (USD $)	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
Common Stock
Balance at beginning of year	$ 184,872	$ 182,099	$ 180,808
Repurchase and retirement of common stock	1,715,352
Issuance of common stock	120	120	120
Exercise of stock options, vesting of restricted stock units and other	1,961	2,653	1,171
Balance at end of year	182,054	184,872	182,099
Additional Paid-In Capital
Balance at beginning of year	8,712,743	8,060,041	7,626,602
Repurchase and retirement of common stock	(1,710,453)
Issuance of common stock	37,080	41,200	37,880
Exercise of stock options, vesting of restricted stock units and other	461,695	586,540	384,364
Tax benefit from employee stock transactions	58,377	24,962	11,195
Balance at end of year	7,559,442	8,712,743	8,060,041
Retained Earnings
Balance at beginning of year	9,838,205	8,411,975	6,923,927
Net income	1,478,212	3,876,032	3,910,841
Cash dividends declared	(2,674,324)	(2,449,802)	(2,422,793)
Balance at end of year	8,642,093	9,838,205	8,411,975
Non-controlling Interest in Equity of Subsidiary
Balance at beginning of year	0	0	0
Net income (loss)	(128,178)
Non-controlling interest in acquired business	664,612
Contributions	469,089
Balance at end of year	1,005,523	0	0
Total Stockholders’ Equity	17,389,112	18,735,820	16,654,115
Common Shares
Balance at beginning of year (in Shares)	6,162,389	6,069,976	6,026,938
Repurchase and retirement of common stock (in Shares)	(163,300)
Issuance of common stock (in Shares)	4,000	4,000	4,000
Exercise of stock options, vesting of restricted stock units and other	65,381	88,413	39,038
Balance at end of year (in Shares)	6,068,470	6,162,389	6,069,976
Repurchase and Retirement of Common Stock (Member)
Common Stock
Repurchase and retirement of common stock	$ (4,899)