CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 01, 2017	Apr. 02, 2016	Apr. 01, 2017	Apr. 02, 2016
Income Statement [Abstract]
Net sales	$ 113,601	$ 118,448	$ 349,253	$ 361,060
Cost of sales	104,462	108,493	320,793	333,076
Gross profit	9,139	9,955	28,460	27,984
Operating expenses
Research, development and engineering expenses	1,569	1,634	4,756	4,696
Selling, general and administrative expenses	5,721	5,564	16,518	16,348
Total operating expenses	7,290	7,198	21,274	21,044
Operating income	1,849	2,757	7,186	6,940
Interest expense, net	566	620	1,707	1,674
Income before income taxes	1,283	2,137	5,479	5,266
Income tax provision	322	354	1,198	879
Net income	$ 961	$ 1,783	$ 4,281	$ 4,387
Earnings per share:
Net income per share — Basic	$ 0.09	$ 0.17	$ 0.40	$ 0.41
Weighted average shares outstanding — Basic	10,759	10,711	10,755	10,709
Net income per share — Diluted	$ 0.09	$ 0.16	$ 0.39	$ 0.39
Weighted average shares outstanding — Diluted	10,957	11,068	10,916	11,298