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Income Taxes (Details) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2014 | Mar. 31, 2013
Components of income taxes |  |  |  |
Income tax expense | $ 319,623 | $ 123,151 | $ 735,784 | $ 219,271
Reconciliation of the statutory federal rate to the Company's effective income tax rate |  |  |  |
Effective tax rates (as a percent) | 29.00% | 10.00% | 29.00% | 13.00%

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