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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $)
3 Months Ended 6 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Net income $ 290,511us-gaap_NetIncomeLoss $ 525,926us-gaap_NetIncomeLoss $ 796,145us-gaap_NetIncomeLoss $ 657,489us-gaap_NetIncomeLoss
Other comprehensive income, net of tax:        
Unrealized gains on marketable securities, net of $0 tax 308us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax   1,098us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax  
Other comprehensive income 308us-gaap_OtherComprehensiveIncomeLossNetOfTax   1,098us-gaap_OtherComprehensiveIncomeLossNetOfTax  
Comprehensive income $ 290,819us-gaap_ComprehensiveIncomeNetOfTax $ 525,926us-gaap_ComprehensiveIncomeNetOfTax $ 797,243us-gaap_ComprehensiveIncomeNetOfTax $ 657,489us-gaap_ComprehensiveIncomeNetOfTax