Consolidated Entities, Joint Ventures and Investments - Equity Method Investments (Detail) - Iconix China $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Schedule Of Equity Method Investments [Line Items]
Value of Investment	$ 22,586
Candies Shanghai Fashion Co., Ltd.
Schedule Of Equity Method Investments [Line Items]
Brands Placed	Candie’s
Ownership by Iconix China	20.00%
Value of Investment	$ 10,100
Shanghai MuXiang Apparel & Accessory Co. Limited
Schedule Of Equity Method Investments [Line Items]
Brands Placed	Marc Ecko
Ownership by Iconix China	15.00%
Value of Investment	$ 2,270
Ningbo Material Girl Fashion Co., Ltd
Schedule Of Equity Method Investments [Line Items]
Brands Placed	Material Girl
Ownership by Iconix China	0.00%
Ai Xi Enterprise (Shanghai) Co. Limited
Schedule Of Equity Method Investments [Line Items]
Brands Placed	Ecko Unltd
Ownership by Iconix China	20.00%
Value of Investment	$ 10,216