Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 29, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Accounts receivable, net of allowance for doubtful accounts of $1,076 and $1,079 as of March 29, 2020 and December 31, 2019, respectively	$ 1,076	$ 1,079