Accrued Expenses and Other Liabilities - Schedule of Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Compensation and benefits	$ 14,469	$ 12,312
Freight, distribution and operations	3,604	2,995
Accrued rebates, discounts and chargebacks	2,860	2,297
Accrued professional fees	2,852	1,701
Other	2,751	1,944
Total accrued expenses and other liabilities	$ 26,536	$ 21,249