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Related Party Transactions: (Details) (USD $)
12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2012
Shareholder      
Related Party Transactions      
Legal fees $ 99,000us-gaap_LegalFees
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_InvestorMember
$ 45,000us-gaap_LegalFees
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_InvestorMember
$ 110,000us-gaap_LegalFees
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_InvestorMember
Individual married to a shareholder and a daughter of Company's Chairman and Chief Executive Officer      
Related Party Transactions      
Service fees $ 6,000us-gaap_ProfessionalFees
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember
$ 4,000us-gaap_ProfessionalFees
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember
$ 2,000us-gaap_ProfessionalFees
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember