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v3.20.2

Summary of Operations and Significant Accounting Policies - Cash and cash Equivalents - Additional Information (Details) | 12 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019
US Treasuries and FDIC Insured |  |
Concentration Risk [Line Items] |  |
Percentage of cash balances | 89.00% | 79.00%

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- 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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- Details
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