Organization and Summary of Significant Accounting Policies - Summary of Customer Allowances for Trade Promotions and Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Trade promotions	$ 943	$ 1,096
Allowance for doubtful accounts	51	88
Trade promotions and allowance for doubtful accounts	$ 994	$ 1,184