Goodwill Trademarks and Other Intangibles, Net - Additional Information (Detail) - USD ($)	1 Months Ended						3 Months Ended		6 Months Ended
	Mar. 31, 2015	Feb. 28, 2015	Dec. 31, 2014	Jun. 30, 2014	Feb. 28, 2014	Jan. 31, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Intangible Assets by Major Class [Line Items]
Amortization expense for intangible assets							$ 800,000	$ 1,000,000	$ 1,724,000	$ 2,468,000
Impairment of intangible assets, indefinite-lived									0	0
Impairment of intangible assets, finite-lived									$ 0	$ 0
Trademarks | Sharper Image
Intangible Assets by Major Class [Line Items]
Increase (Decrease) in indefinite-lived trademarks				$ (3,600,000)
Iconix China
Intangible Assets by Major Class [Line Items]
Controlling interest	50.00%
Interest acquired, including previously acquired interest	100.00%
Iconix China | Trademarks
Intangible Assets by Major Class [Line Items]
Increase in value of indefinite-lived intangible assets	$ 40,500,000
Strawberry Shortcake | Trademarks
Intangible Assets by Major Class [Line Items]
Increase in value of indefinite-lived intangible assets	55,800,000
Strawberry Shortcake | Licensing agreements
Intangible Assets by Major Class [Line Items]
Increase in value of indefinite-lived intangible assets	$ 500,000
Pony International, LLC.
Intangible Assets by Major Class [Line Items]
Controlling interest		75.00%
Non-controlling interest		25.00%
Pony International, LLC. | Trademarks
Intangible Assets by Major Class [Line Items]
Increase in value of indefinite-lived intangible assets		$ 32,400,000
Pony International, LLC. | Licensing agreements
Intangible Assets by Major Class [Line Items]
Increase in value of indefinite-lived intangible assets		$ 300,000
Hydraulic IP Holdings
Intangible Assets by Major Class [Line Items]
Controlling interest			51.00%
Hydraulic IP Holdings | Trademarks
Intangible Assets by Major Class [Line Items]
Increase in value of indefinite-lived intangible assets			$ 11,800,000
NGX LLC
Intangible Assets by Major Class [Line Items]
Controlling interest			51.00%
NGX LLC | Trademarks
Intangible Assets by Major Class [Line Items]
Increase in value of indefinite-lived intangible assets			$ 11,800,000
Iconix Latin America
Intangible Assets by Major Class [Line Items]
Controlling interest					50.00%
Interest acquired, including previously acquired interest					100.00%
Iconix Latin America | Trademarks
Intangible Assets by Major Class [Line Items]
Increase in value of indefinite-lived intangible assets					$ 82,400,000
Iconix Latin America | Licensing agreements
Intangible Assets by Major Class [Line Items]
Increase in value of indefinite-lived intangible assets					$ 700,000
Iconix Europe
Intangible Assets by Major Class [Line Items]
Controlling interest						1.00%
Interest acquired, including previously acquired interest						51.00%
Iconix Europe | Trademarks
Intangible Assets by Major Class [Line Items]
Increase in value of finite-lived intangible assets						$ 27,000,000