Acquisitions - Additional Information (Detail) $ in Millions	1 Months Ended
Nov. 30, 2021 USD ($)
Tokai Carbon Group(Tianjin) Co. [Member]
Business Acquisition [Line Items]
Business acquisition, purchase price	$ 9

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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