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Quarterly Financial Information (Unaudited Supplemental Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 01, 2016 | Oct. 02, 2015 | Jul. 03, 2015 | Apr. 03, 2015 | Jan. 02, 2015 | Sep. 26, 2014 | Jun. 27, 2014 | Mar. 28, 2014 | Jan. 01, 2016 | Jan. 02, 2015 | Dec. 27, 2013
Consolidated Statements of Operations [Abstract] |  |  |  |  |  |  |  |  |  |  |
Total revenue | $ 60,261 | $ 59,992 | $ 59,423 | $ 54,905 | $ 54,551 | $ 54,550 | $ 55,000 | $ 49,418 | $ 260,940 | $ 236,737 | $ 223,830
Operating income | 6,298 | 4,943 | 6,049 | 4,635 | 4,224 | 3,986 | 3,966 | 410 | 21,925 | 12,586 | 15,727
Income from continuing operations | 6,237 | 4,842 | 5,940 | 4,497 | 4,063 | 3,815 | 3,801 | 287 | 13,809 | 9,711 | 8,864
Net income | $ 4,055 | $ 3,058 | $ 3,691 | $ 3,005 | $ 3,542 | $ 2,936 | $ 2,828 | $ 405 | $ 13,809 | $ 9,711 | $ 8,729
Basic net income per common share | $ 0.14 | $ 0.11 | $ 0.13 | $ 0.11 | $ 0.13 | $ 0.10 | $ 0.10 | $ 0.01 | $ 0.47 | $ 0.34 | $ 0.29
Diluted net income per common share | $ 0.12 | $ 0.10 | $ 0.12 | $ 0.10 | $ 0.12 | $ 0.10 | $ 0.09 | $ 0.01 | $ 0.43 | $ 0.33 | $ 0.27

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