Note 12 - Summarized Quarterly Data (Unaudited) (Details) - Quarterly Results of Operations (USD $)	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 29, 2012
2014
Total revenue	$ 39,184,807	$ 36,315,201	$ 34,626,892
Gross margin before depreciation	12,048,862	11,188,923
Net income	4,392,444	1,478,212	3,876,032
Basic earnings (in Dollars per share)	$ 0.72	$ 0.24	$ 0.63
Diluted earnings (in Dollars per share)	$ 0.68	$ 0.24	$ 0.62
By Quarter (Member)
2014
Net income	4,392,444	1,478,212
By Quarter (Member) | First Quarter (Member)
2014
Net income	1,179,307	1,062,329
By Quarter (Member) | Second Quarter (Member)
2014
Net income	1,027,784	828,782
By Quarter (Member) | Third Quarter (Member)
2014
Net income	699,174	(509,484)
By Quarter (Member) | Fourth Quarter (Member)
2014
Net income	1,486,179	96,585
First Quarter (Member)
2014
Total revenue	10,177,862	9,658,193
Gross margin before depreciation	3,151,525	3,068,390
Basic earnings (in Dollars per share)	$ 0.19	$ 0.17
Diluted earnings (in Dollars per share)	$ 0.19	$ 0.17
Second Quarter (Member)
2014
Total revenue	8,663,161	7,729,837
Gross margin before depreciation	2,985,223	2,560,569
Basic earnings (in Dollars per share)	$ 0.17	$ 0.14
Diluted earnings (in Dollars per share)	$ 0.16	$ 0.13
Third Quarter (Member)
2014
Total revenue	9,279,994	8,635,804
Gross margin before depreciation	2,739,681	2,558,493
Basic earnings (in Dollars per share)	$ 0.11	$ (0.08)
Diluted earnings (in Dollars per share)	$ 0.11	$ (0.08)
Fourth Quarter (Member)
2014
Total revenue	11,063,790	10,291,367
Gross margin before depreciation	$ 3,172,433	$ 3,001,471
Basic earnings (in Dollars per share)	$ 0.24	$ 0.02
Diluted earnings (in Dollars per share)	$ 0.23	$ 0.02