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Income Taxes (Details) (USD $)
3 Months Ended 6 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Components of income taxes        
Income tax expense (benefit) $ (258,454)us-gaap_IncomeTaxExpenseBenefit $ 319,623us-gaap_IncomeTaxExpenseBenefit $ (669,174)us-gaap_IncomeTaxExpenseBenefit $ 735,784us-gaap_IncomeTaxExpenseBenefit
Reconciliation of the statutory federal rate to the Company's effective income tax rate        
Effective tax rates (as a percent) (42.00%)us-gaap_EffectiveIncomeTaxRateContinuingOperations 29.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations (152.00%)us-gaap_EffectiveIncomeTaxRateContinuingOperations 29.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations