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Income Taxes - Schedule of Reconciliation of Effective Income Tax Amount (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax benefit using U.S. federal statutory rate	$ 1,352	$ 1,397
State income tax expense	(35)	(30)
Foreign income tax expense	(210)	(78)
Foreign tax rate difference	(29)	0
Non-deductible expenses	26	(66)
Impact of change in statutory rate
Change in valuation allowance	(1,383)	(1,306)
Other	23	(33)
Provision for income taxes	$ (256)	$ (116)

X

- Definition

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

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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