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