Joint Ventures and Investments - Equity Method Investments (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Dec. 31, 2020
Iconix China Holdings Limited
Schedule Of Equity Method Investments [Line Items]
Carrying Value of Investment		$ 1,296	$ 1,341
Iconix India
Schedule Of Equity Method Investments [Line Items]
Date of Original Formation / Investment		2012-06
Partner		Reliance Brands Ltd.
Iconix SE Asia, Ltd. | Put / Call Options
Schedule Of Equity Method Investments [Line Items]
Date of Original Formation / Investment	[1]	2013-10
Partner	[1]	Global Brands Group Asia Limited
MG Icon
Schedule Of Equity Method Investments [Line Items]
Date of Original Formation / Investment	[1]	2010-03
Partner	[1]	Purim LLC
Candies Shanghai Fashion Co. Ltd. | Iconix China Holdings Limited
Schedule Of Equity Method Investments [Line Items]
Brands Placed	[2]	Candie’s
Ownership by Iconix China	[2]	20.00%
Shanghai MuXiang Apparel & Accessory Co. Limited | Iconix China Holdings Limited
Schedule Of Equity Method Investments [Line Items]
Brands Placed	[3]	Marc Ecko
Ownership by Iconix China	[3]	0.00%
Ai Xi Enterprise (Shanghai) Co. Limited | Iconix China Holdings Limited
Schedule Of Equity Method Investments [Line Items]
Brands Placed		Ecko Unltd
Ownership by Iconix China		20.00%
Carrying Value of Investment		$ 1,296	$ 1,341

[1] A six-month put option window for Iconix SE Asia, Ltd commences on July 1, 2022. Refer to the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 for material terms of the put/call options associated with this joint venture.

[2] As a result of recent losses, primarily due to the effect of COVID-19 on the retail industry, the Company determined that the losses were other than temporary and determined that the fair value of its investment was de minimis. Accordingly, the Company recorded an impairment charge of $9.8 million during FY 2020.

[3] In August 2020, the Company rescinded the trademark rights for the Ecko/Marc Ecko brand in exchange for its equity interest in the joint venture and recorded an impairment charge of $9.7 million in the third quarter of 2020.