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v3.21.1

Summary of Significant Accounting Policies - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2020
Land improvements [member] |
Disclosure of significant accounting policies [line items] |
Useful lives of property, plant and equipment | 20 years
Buildings (assets used by the Company and assets subject to operating leases) [member] | Bottom of range [member] |
Disclosure of significant accounting policies [line items] |
Useful lives of property, plant and equipment | 10 years
Buildings (assets used by the Company and assets subject to operating leases) [member] | Top of range [member] |
Disclosure of significant accounting policies [line items] |
Useful lives of property, plant and equipment | 20 years
Machinery and equipment [member] |
Disclosure of significant accounting policies [line items] |
Useful lives of property, plant and equipment | 5 years
Office equipment [member] |
Disclosure of significant accounting policies [line items] |
Useful lives of property, plant and equipment | 5 years

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