Quarterly report pursuant to Section 13 or 15(d)

Net Income Per Share (Computation of Basic and Diluted Earnings Per Share) (Details)

v3.10.0.1
Net Income Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 24, 2017
Sep. 30, 2018
Sep. 24, 2017
BASIC        
Net (loss) income $ (7,510) $ 3,195 $ 2,129 $ 13,074
Weighted-average common shares outstanding 16,948,701 16,905,705 16,940,777 16,886,743
Basic net (loss) income per common share $ (0.44) $ 0.19 $ 0.13 $ 0.77
DILUTED        
Net (loss) income $ (7,510) $ 3,195 $ 2,129 $ 13,074
Weighted-average common shares outstanding 16,948,701 16,905,705 16,940,777 16,886,743
Dilutive effect of stock options and restricted stock units 165,489 81,089 140,594 111,570
Weighted-average of diluted shares 17,114,190 16,986,794 17,081,371 16,998,313
Diluted net (loss) income per common share $ (0.44) $ 0.19 $ 0.12 $ 0.77