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Quarterly Financial Data (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2018
Mar. 31, 2018
Dec. 30, 2017
Sep. 30, 2017
Jul. 01, 2017
Apr. 01, 2017
Dec. 31, 2016
Oct. 01, 2016
Jun. 30, 2018
Jul. 01, 2017
Jul. 02, 2016
Quarterly Financial Information Disclosure [Abstract]                      
Net sales $ 117,028 $ 108,352 $ 111,725 $ 109,217 $ 118,544 $ 113,601 $ 118,517 $ 117,135 $ 446,322 $ 467,797 $ 484,965
Gross profit 9,369 8,155 8,800 7,845 9,840 9,139 9,612 9,709 34,169 38,300 38,825
Income before income taxes (3,170) 123 1,035 570 1,777 1,283 1,995 2,201 (1,442) 7,256 8,151
Net income (loss) $ (2,177) $ 644 $ (224) $ 432 $ 1,336 $ 961 $ 1,528 $ 1,792 $ (1,325) $ 5,617 $ 6,533
Earnings per share – basic (in dollars per share) $ (0.20) $ 0.06 $ (0.02) $ 0.04 $ 0.12 $ 0.09 $ 0.14 $ 0.17 $ (0.12) $ 0.52 $ 0.61
Earnings per share – diluted (in dollars per share) $ (0.20) $ 0.06 $ (0.02) $ 0.04 $ 0.12 $ 0.09 $ 0.14 $ 0.16 $ (0.12) $ 0.51 $ 0.58
Weighted average shares outstanding– basic 10,760 10,760 10,760 10,760 10,760 10,759 10,758 10,748 10,760 10,756 10,710
Weighted average shares outstanding — Diluted 10,760 10,760 10,760 10,760 10,856 10,957 10,968 10,922 10,760 10,917 11,278