Summary of Significant Accounting Policies - Income Taxes (Details) - USD ($) |
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2019 |
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| Accounting Policies [Abstract] | |||
| Valuation allowance relating to unutilized capital loss | $ 0 | $ 0 | $ 0 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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