Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 26, 2021	Dec. 26, 2020
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts and customer credits	$ 1,220	$ 1,260
Accumulated amortization of intangible assets	$ 10,886	$ 9,194
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	31,891,890	32,168,740
Common stock, shares outstanding	31,891,890	32,168,740