Business Combinations - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Oct. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Potential Acquisitions [Line Items]
Cash paid for intangible assets		$ 0	$ 0	$ 300
C'est Moi brand
Potential Acquisitions [Line Items]
Cash paid for intangible assets	$ 300