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Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Current
Non-U.S.	$ (218)
Total current	(218)
Deferred
U.S. federal	(4,377)	$ (8,551)
U.S. state	(469)	3,299
Total deferred	(4,846)	(5,252)
Valuation allowance	4,846	$ 5,252
Total	$ (218)

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

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