Income Taxes - Effective Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Increase (Decrease) in Tax Rate:
Statutory rate	21.00%	21.00%
State tax	1.10%	(1.30%)
Warrants, BCF, and other equity items	(28.70%)	(33.30%)
Valuation allowance	6.40%	15.60%
Other	0.70%	(0.20%)
Foreign rate differential	(0.20%)	(0.20%)
Stock-based compensation	(0.30%)	(1.60%)
Effective income tax rate	0.00%	0.00%
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory rate	$ 16,500	$ 8,833
State tax	875	(563)
Warrants, BCF, and other equity items	(22,559)	(14,002)
Valuation allowance	5,040	6,552
Other	502	(72)
Foreign rate differential	(148)	(85)
Stock-based compensation	(207)	(660)
Total tax expense	$ 3	$ 3

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

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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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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