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Related Party Transactions - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Related Party Transaction [Line Items]      
Net losses related to certain WisdomTree ETFs $ 806 $ 384  
WisdomTree ETF [Member]      
Related Party Transaction [Line Items]      
Investment $ 15,769   $ 18,526