v3.8.0.1
Net Income (Loss) Per Share - Calculation of Basic and Diluted Net Loss Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 30, 2017
Sep. 30, 2017
Jul. 01, 2017
Apr. 01, 2017
Dec. 31, 2016
Sep. 24, 2016
Jun. 25, 2016
Mar. 26, 2016
Dec. 30, 2017
Dec. 31, 2016
Dec. 26, 2015
Basic:                      
Net income (loss) from continuing operations attributable to common stockholders, basic                 $ 6,944 $ (3,612) $ (17,879)
Net income (loss) from discontinued operations attributable to common stockholders, basic                 0 6,757 (17,116)
Dilutive                      
Plus: undistributed earnings allocated to participating securities                 3,719 0 0
Less: undistributed earnings reallocated to participating securities                 (3,637) 0 0
Net income (loss) from continuing operations attributable to common stockholders, diluted                 7,026 (3,612) (17,879)
Net income (loss) from discontinued operations attributable to common stockholders, diluted                 $ 0 $ 6,757 $ (17,116)
Denominator:                      
Weighted average number of shares outstanding, basic 30,189       28,864,000       29,680,000 30,535,000 32,001,000
Dilutive impact from:                      
Weighted average number of shares outstanding, diluted 33,128,000       30,815       32,406,000 30,535,000 32,001,000
Net income (loss) per share attributable to common stockholders (Basic):                      
Income (loss) per share from continuing operations attributable to common stockholders (in dollars per share)         $ 0.13 $ (0.14) $ (0.11) $ (0.03) $ 0.23 $ (0.12) $ (0.56)
Income (loss) per share from discontinued operations attributable to common stockholders (in dollars per share)                 0.00 0.22 (0.53)
Net income (loss) per share attributable to common stockholders, basic (in dollars per share) $ 0.21 $ (0.01) $ 0.03 $ 0.01 0.13 (0.14) (0.11) 0.21 0.23 0.10 (1.09)
Net income (loss) per share attributable to common stockholders (Diluted):                      
Income (loss) per share from continuing operations attributable to common stockholders (in dollars per share)         0.12 (0.14) (0.11) (0.03) 0.22 (0.12) (0.56)
Income (loss) per share from discontinued operations attributable to common stockholders (in dollars per share)                 0.00 0.22 (0.53)
Net income (loss) per share attributable to common stockholders, diluted (in dollars per share) $ 0.19 $ (0.01) $ 0.03 $ 0.01 $ 0.12 $ (0.14) $ (0.11) $ 0.21 $ 0.22 $ 0.10 $ (1.09)
Employee Stock Option                      
Dilutive impact from:                      
Share-based payment arrangements                 1,941,000 0 0
Restricted Stock Units (RSUs)                      
Dilutive impact from:                      
Share-based payment arrangements                 785,000 0 0