Gains on Sale of Trademarks, net - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended			12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Feb. 29, 2016	Dec. 31, 2018
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Net gains (losses) on sale of trademarks				$ 1,268
Badgley Mischka Intellectual Property / MJCLK Apparel License
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Proceeds from sale of rights			$ 13,800
Badgley Mischka Intellectual Property / MJCLK Apparel License | UNITED STATES
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Net gains (losses) on sale of trademarks			$ 11,600
Interest in Badgley Mischka Canada trademark
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Net gains (losses) on sale of trademarks	$ 400
Proceeds from sale of interest	400
Badgley Mischka Intellectual Property and Related Assets
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Net gains (losses) on sale of trademarks				300
Badgley Mischka Intellectual Property and Related Assets
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Net gains (losses) on sale of trademarks				12,300
Sharper Image intellectual property and related assets
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Proceeds from sale of rights		$ 100,000
Net gains (losses) on sale of trademarks		28,100		29,600
Held in escrow for sale of property		$ 1,800
Interest in Sharper Image Canada trademark
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Net gains (losses) on sale of trademarks	500
Proceeds from sale of interest	$ 500
Sharper Image intellectual property and related assets
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Net gains (losses) on sale of trademarks				$ 1,000