CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Apr. 03, 2020	Jan. 03, 2020
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts receivable, current	$ 49	$ 88
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	45,105,000	44,822,000
Common stock, shares outstanding	45,105,000	44,822,000