XML 48 R35.htm IDEA: XBRL DOCUMENT v3.19.1
Schedule of Accounts Receivable, Net (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Receivables [Abstract]    
Accounts receivable, gross $ 4,861 $ 5,198
Wholesaler distribution fees and prompt pay discounts (890) (868)
Reserve for returns (212) (313)
Accounts receivable, net $ 3,759 $ 4,017