Revenue Recognition and Accounts Receivable - Schedule of Components of Net Sales (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue Recognition [Abstract]
Product sales	$ 100,004	$ 96,305	$ 299,214	$ 250,161
Marketing service fees	12,424	14,680	40,201	38,782
Net sales	$ 112,428	$ 110,985	$ 339,415	$ 288,943