Segment Reporting Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 209,448	$ 165,957	$ 476,268	$ 396,706
Depreciation and amortization	6,076	4,063	16,807	10,697
Income (Loss) from operations	12,303	9,333	(4,314)	4,318
Assets	800,434		800,434		$ 401,521
Unallocated corporate expenses
Segment Reporting Information [Line Items]
Income (Loss) from operations	(5,184)	(3,633)	(14,805)	(9,534)
Assets	17,821		17,821		13,526
U. S. Wholesale
Segment Reporting Information [Line Items]
Net sales	178,518	137,096	393,661	319,258
Depreciation and amortization	5,006	3,010	13,435	7,613
U. S. Wholesale \| Operating Segments
Segment Reporting Information [Line Items]
Income (Loss) from operations	18,505	14,798	15,078	20,745
Assets	681,388		681,388		281,398
International
Segment Reporting Information [Line Items]
Net sales	22,460	25,330	63,389	65,923
Depreciation and amortization	1,067	1,048	3,359	3,013
International \| Operating Segments
Segment Reporting Information [Line Items]
Income (Loss) from operations	(2,628)	(1,573)	(6,052)	(6,473)
Assets	100,324		100,324		105,984
Retail Direct
Segment Reporting Information [Line Items]
Net sales	8,470	3,531	19,218	11,525
Depreciation and amortization	3	5	13	71
Retail Direct \| Operating Segments
Segment Reporting Information [Line Items]
Income (Loss) from operations	1,610	$ (259)	1,465	$ (420)
Assets	$ 901		$ 901		$ 613

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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