Number of shares of equity interests issued or issuable to acquire entity.

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- Definition

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Number of shares issued for each share of convertible preferred stock that is converted.

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- Definition

Fair value of preferred stock consideration.

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Other Redemption Rights Unrelated To Stockholder Description

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Preferred Stock Redemption Value.

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Series A Preferred Stock - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Apr. 11, 2018	Mar. 31, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Fair value of preferred stock consideration	$ 132,750
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Other redemption rights unrelated to stockholder approval		Temporary equity classification is required for redeemable instruments for which redemption triggers are outside of the issuer’s control. ETFS Capital has the right to redeem all the Series A Preferred Stock specified to be converted during the period of time specified in the Series A Certificate of Designations in the event that: (a) the number of shares of the Company’s common stock authorized by its certificate of incorporation is insufficient to permit the Company to convert all of the Series A Preferred Stock requested by ETFS Capital to be converted; or (b) ETFS Capital does not, upon completion of a change of control of the Company, receive the same amount per Series A Preferred Stock as it would have received had each outstanding Series A Preferred Stock been converted into common stock immediately prior to the change of control. However, the Company will not be obligated to make any such redemption payments to the extent such payments would be a breach of any covenant or obligation the Company owes to any of its secured creditors or is otherwise prohibited by applicable law.
Preferred stock redemption value		$ 86,638	$ 77,969
Acquisition of ETFS Business [Member] \| Preferred Stock [Member] \| Series A Preferred Stock [Member]
Class of Stock [Line Items]
Shares issued in business acquisition	14,750
Acquisition of ETFS Business [Member] \| Common Stock [Member]
Class of Stock [Line Items]
Common stock equivalents	14,750,000
Series of Individually Immaterial Business Acquisitions [Member]
Class of Stock [Line Items]
Acquisition price per share	$ 9