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Condensed Consolidated Balance Sheets - Unaudited (Parenthetical) - USD ($) $ in Millions	Apr. 02, 2021	Dec. 31, 2020
Current assets:
Allowance for doubtful accounts	$ 0.2	$ 0.2
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)	32,974,702	32,908,178
Common stock, shares outstanding (in shares)	32,974,702	32,908,178

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