Schedule of Accounts Receivable, Net (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Accounts receivable, gross	$ 8,393	$ 6,925
Wholesaler distribution fees and prompt pay discounts	(1,458)	(1,767)
Reserve for returns	(1,903)	(1,645)
Accounts receivable, net	$ 5,032	$ 3,513

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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