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Summary of Significant Accounting Policies - Short-term Investments (Details)	Sep. 30, 2019	Sep. 30, 2018
Minimum
Short-term Debt [Line Items]
Interest rate	1.97%	1.97%
Maximum
Short-term Debt [Line Items]
Interest rate	2.80%	2.80%

X

- Definition

Short-Term Investments, Interest Rate

+ References

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X

- Definition

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

No definition available.

+ Details

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X

- Details

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X

- Details

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