Gains on Sale of Trademarks, net - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended
	Dec. 31, 2016	Feb. 29, 2016	Mar. 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			$ 1,143
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	$ 800
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