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Segment Information - Customers Accounted for 10% or More of Revenue (Detail) - Customer Concentration Risk [Member] - Sales [Member]
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Central Banks [Member]    
Revenue, Major Customer [Line Items]    
Entity wide revenue major customers percentage 47.00% 58.00%
Walmart Inc. [Member]    
Revenue, Major Customer [Line Items]    
Entity wide revenue major customers percentage 10.00% 11.00%