Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid deposits for inventory and molds	$ 835	$ 2,138
Prepaid royalties, net	13,016	5,465
Other prepaid expenses and current assets	6,429	4,301
Prepaid expenses and other current assets	$ 20,280	$ 11,904