Summary of Significant Accounting Policies - Foreign Currency and Advertising (Details) - USD ($) $ in Millions	12 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Schedule of Equity Method Investments [Line Items]
Foreign currency transaction gains (losses) not accounted for as translations	$ 0.3	$ 0.4	$ 0.5
Advertising expense	$ 2.0	$ 2.5	$ 1.9
Cash Converters International Limited
Schedule of Equity Method Investments [Line Items]
Period related interest in investee's net income is translated	6 months

Income (Loss) from Equity Method Investment, Foreign Currency Translation Adjustment, Period

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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