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Condensed Consolidated Balance Sheets - Unaudited (Parenthetical) - USD ($)
$ in Millions
Jul. 01, 2016
Jan. 01, 2016
Current assets:    
Allowance for doubtful accounts $ 1.0 $ 1.0
Stockholders’ equity:    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 100,000,000 100,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 30,935,792 30,664,119
Common stock, shares outstanding 30,801,205 30,601,167
Treasury stock, shares 134,587 62,952