Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of gain (loss) recognized in income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Fair value of financial and nonfinancial obligations.

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Fair value of assets and liabilities measured on recurring basis.

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Fair Value of Financial Instruments - Summarizes the Conclusions Reached Regarding Fair Value Measurements (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Significant Unobservable Inputs (Level 3) [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Balance at January 1	$ 1,262	$ 2,871
Net Change in fair value included in earnings	(492)	1,648
Balance at March 31,	770	4,519
Significant Unobservable Inputs (Level 3) [Member] \| Warrant Liability, Related Party [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Balance at January 1	1,262	2,871
Net Change in fair value included in earnings	(492)	1,648
Balance at March 31,	770	$ 4,519
Fair Value, Measurements, Recurring [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Total	1,694		$ 4,928
Total	770		1,262
Fair Value, Measurements, Recurring [Member] \| Warrant Liability, Related Party [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Total	770		1,262
Fair Value, Measurements, Recurring [Member] \| Equity Securities With Readily Determinable Fair Value [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Total	1,694		4,928
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Asset (Level 1) [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Total	1,694		4,928
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Asset (Level 1) [Member] \| Equity Securities With Readily Determinable Fair Value [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Total	1,694		4,928
Fair Value, Measurements, Recurring [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Total	770		1,262
Fair Value, Measurements, Recurring [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Warrant Liability, Related Party [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Total	$ 770		$ 1,262