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Statements Of Shareholders' Equity (USD $) | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Total
--- | --- | --- | --- | ---
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 |  |  |
Stock-based compensation expense |  | 467,120 |  | 467,120
Restricted Stock Issuance, Net | 3,590 |  |  | 3,590
Restricted Stock Issuance, Net (in Shares) | 359,000 |  |  |
Employee stock purchase plan | 288 | 142,254 |  | 142,542
Employee stock purchase plan (in Shares) | 28,929 |  |  |
Exercise of stock options | 1,716 | 140,568 |  | 142,284
Exercise of stock options (in Shares) | 171,480 |  |  |
Net income |  |  | 7,701,194 | 7,701,194
Balance at Sep. 30, 2012 | 128,301 | 54,152,080 | (19,594,480) | 34,685,901
Balance (in Shares) at Sep. 30, 2012 | 12,830,100 |  |  |
Stock-based compensation expense |  | 753,727 |  | 753,727
Restricted Stock Issuance, Net | 41 | 25 |  | 66
Restricted Stock Issuance, Net (in Shares) | 4,090 |  |  |
Employee stock purchase plan | 356 | 135,625 |  | 135,981
Employee stock purchase plan (in Shares) | 35,597 |  |  |
Exercise of stock options | 1,394 | 62,606 |  | 64,000
Exercise of stock options (in Shares) | 139,455 |  |  |
Tax withholding related to vesting of restricted stock grants and exercise of stock options | (349) | (297,639) |  | (297,988)
Tax withholding related to vesting of restricted stock grants and exercise of stock options (in Shares) | (34,979) |  |  |
Excess tax benefit of stock options exercised |  | 2,505 |  | 2,505
Net income |  |  | 4,733,844 | 4,733,844
Balance at Sep. 30, 2013 | $ 129,743 | $ 54,808,929 | $ (14,860,636) | $ 40,078,036
Balance (in Shares) at Sep. 30, 2013 | 12,974,263 |  |  |

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