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Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Smith, Gambrell & Russell, LLP [Member]
Related Party Transaction [Line Items]
Fees payable to Smith, Gambrell & Russell	$ 0.1	$ 0.1
Amount due to related party	0.0		$ 0.0
European Metal Recycling Limited [Member]
Related Party Transaction [Line Items]
Amount due to related party	0.0		0.0
Tendering process to select best buyer of scrap metal	0.1	0.4
Advan Six [Member]
Related Party Transaction [Line Items]
Amount due to related party	0.0		$ 0.1
Tendering process to select best buyer of scrap metal	$ 0.3	$ 0.1

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