Revenue Recognition and Accounts Receivable - Schedule of Components of Net Sales (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue Recognition [Abstract]
Product sales	$ 106,947	$ 62,435	$ 199,210	$ 153,856
Marketing service fees	14,447	10,700	27,777	24,102
Net sales	$ 121,394	$ 73,135	$ 226,987	$ 177,958