Joint Ventures and Investments - Equity Method Investments (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Iconix China Holdings Limited
Schedule Of Equity Method Investments [Line Items]
Value of Investment	$ 25,310
Iconix Australia, LLC | Put / Call Options
Schedule Of Equity Method Investments [Line Items]
Date of Original Formation / Investment	2013-09	[1],[2]
Joint Venture Partner	Pac Brands USA, Inc.	[1],[2]
Iconix India
Schedule Of Equity Method Investments [Line Items]
Date of Original Formation / Investment	2012-06	[1],[2]
Joint Venture Partner	Reliance Brands Ltd.	[1],[2]
Iconix SE Asia, Ltd. | Put / Call Options
Schedule Of Equity Method Investments [Line Items]
Date of Original Formation / Investment	2013-10	[1],[2]
Joint Venture Partner	Global Brands Group Asia Limited	[1],[2]
MG Icon
Schedule Of Equity Method Investments [Line Items]
Date of Original Formation / Investment	2010-03	[1],[2]
Joint Venture Partner	Purim LLC	[1],[2]
Galore Media, Inc.
Schedule Of Equity Method Investments [Line Items]
Date of Original Formation / Investment	2016-04	[1],[2],[3]
Joint Venture Partner	Various minority interest holders	[1],[2],[3]
Candies Shanghai Fashion Co., Ltd. | Iconix China Holdings Limited
Schedule Of Equity Method Investments [Line Items]
Brands Placed	Candie’s
Ownership by Iconix China	20.00%
Value of Investment	$ 10,343
Shanghai MuXiang Apparel & Accessory Co. Limited | Iconix China Holdings Limited
Schedule Of Equity Method Investments [Line Items]
Brands Placed	Marc Ecko
Ownership by Iconix China	15.00%
Value of Investment	$ 2,270
Ningo Material Girl Fashion Co., Ltd | Iconix China Holdings Limited
Schedule Of Equity Method Investments [Line Items]
Brands Placed	Material Girl
Ownership by Iconix China	20.00%
Value of Investment	$ 2,129
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%
Value of Investment	$ 10,568

[1] Refer to the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 for material terms of the put and call options associated with the Company’s joint venture.

[2] The Company determined, in accordance with ASC 810, based on the corporate structure, voting rights and contributions of the Company and its respective joint venture partner, that the joint venture is not a VIE and not subject to consolidation. The Company has recorded its investment under the equity method of accounting since inception.

[3] In September 2017, the Company entered into a stock repurchase agreement with Galore Media, Inc. (“Galore”) whereby the Company sold, and Galore agreed to repurchase, the Company’s 50,050 outstanding shares of Series A Preferred Stock of Galore for $0.5 million. Pursuant to the stock repurchase agreement, the Company received $0.3 million upon execution of the agreement and the remaining $0.2 million was received in December 2017. Additionally, pursuant to the stock repurchase agreement, the Company forfeited and surrendered the 46,067 shares of Series A Preferred Stock of Galore that were received in April 2016 upon the Company’s exercise of the initial warrant. All remaining warrants to purchase additional shares of Series A Preferred Stock of Galore were also forfeited as part of the stock repurchase arrangement. This transaction resulted in the Company’s ownership interest in Galore being reduced to zero.