Gains on Sale of Trademarks, net - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
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		$ 875	$ 1,268	$ 875
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
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
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
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