Statements Of Shareholders' Equity (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance at Sep. 30, 2009	$ 119,746	$ 52,372,139	$ (34,644,074)	$ 17,847,811
Balance (in Shares) at Sep. 30, 2009	11,974,631
Stock-based compensation expense		167,725		167,725
Exercise of stock options	407	49,170		49,577
Exercise of stock options (in Shares)	40,700
Net income			1,180,954	1,180,954
Balance at Sep. 30, 2010	120,153	52,589,034	(33,463,120)	19,246,067
Balance (in Shares) at Sep. 30, 2010	12,015,331
Excess tax benefit of stock options exercised		12,478		12,478
Stock-based compensation expense	34	535,313		535,347
Stock-based compensation expense shares (in Shares)	3,420
Employee stock purchase plan	322	87,345		87,667
Employee stock purchase plan (in Shares)	32,229
Exercise of stock options	2,198	177,968		180,166
Exercise of stock options (in Shares)	219,711
Net income			6,167,446	6,167,446
Balance at Sep. 30, 2011	$ 122,707	$ 53,402,138	$ (27,295,674)	$ 26,229,171
Balance (in Shares) at Sep. 30, 2011	12,270,691