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Joint Ventures and Investments - Equity Method Investments (Parenthetical) (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2019
Sep. 30, 2020
Sep. 30, 2020
Dec. 31, 2019
Schedule Of Equity Method Investments [Line Items]        
Payment received upon sale interest in subsidiary     $ 2,750  
Ningbo Material Girl Fashion Co. Ltd. | Ningbo Peacebird Fashion & Accessories Co. Ltd.        
Schedule Of Equity Method Investments [Line Items]        
Percentage of equity ownership interest sold 20.00%      
Sale of ownership interest $ 3,000      
Sale price reduction by initial cash investments 200      
Brand management expenses incurred 600      
Payment received upon sale interest in subsidiary $ 2,200      
Ningbo Material Girl Fashion Co. Ltd. | Purim LLC.        
Schedule Of Equity Method Investments [Line Items]        
Percentage of equity ownership interest sold 33.30%      
Sale of ownership interest $ 700      
Payment received upon sale interest in subsidiary $ 1,500      
Gain on sale of equity investments       $ 200
Candies Shanghai Fashion Co. Ltd. | COVID-19        
Schedule Of Equity Method Investments [Line Items]        
Fair value of investments   $ 2,400 $ 2,400  
Impairment charge   7,400    
Ai Xi Enterprise (Shanghai) Co. Limited        
Schedule Of Equity Method Investments [Line Items]        
Impairment charge   $ 9,700