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Summary of Significant Accounting Policies (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Summary of Significant Accounting Policies
Capital losses available for tax purposes

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- Definition

The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

No definition available.

+ Details

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Namespace Prefix:	cef_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

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Namespace Prefix:	cef_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration