Condensed Consolidated Balance Sheets - Unaudited (Parenthetical) - USD ($) $ in Millions	Apr. 03, 2020	Dec. 31, 2019
Current assets:
Allowance for doubtful accounts	$ 2.2	$ 2.4
Stockholders’ equity:
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	32,847,017	32,847,017
Common stock, shares outstanding (in shares)	32,826,005	32,700,471
Treasury stock, shares (in shares)	21,012	146,546