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Concentration of Credit Risk	3 Months Ended
Concentration of Credit Risk	Dec. 31, 2017
Risks and Uncertainties [Abstract]
Concentration of Credit Risk	Concentration of Credit Risk Information regarding our concentration of credit risk is disclosed in Note 16 to the financial statements in our Annual Report on Form 10-K for the fiscal year ended September 30, 2017. During the three months ended December 31, 2017, there were no material changes in our concentration of credit risk.