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Income Taxes - Summary of Provision (Benefit) for Income Taxes (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Deferred:
Federal	$ (404)
Deferred income tax expense (benefit)	(404)
Provision (benefit) for income taxes	$ (404)

X

- Definition

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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