Accounts payable and Accrued Liabilities - Additional Information (Detail)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Accounts Payable \| Supplier Concentration Risk \| Three Vendors
Accounts Payable And Accrued Expenses [Line Items]
Concentration risk percentage	55.00%	61.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-Publisher FASB
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-Publisher FASB
-Name Accounting Standards Codification
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