CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Income Statement [Abstract]
Net sales	$ 108,352	$ 113,601	$ 329,294	$ 349,253
Cost of sales	100,197	104,462	304,494	320,793
Gross profit	8,155	9,139	24,800	28,460
Operating expenses
Research, development and engineering expenses	1,560	1,569	4,565	4,756
Selling, general and administrative expenses	5,816	5,721	16,641	16,518
Total operating expenses	7,376	7,290	21,206	21,274
Operating income	779	1,849	3,594	7,186
Interest expense, net	656	566	1,866	1,707
Income before income taxes	123	1,283	1,728	5,479
Income tax provision (benefit)	(521)	322	876	1,198
Net income	$ 644	$ 961	$ 852	$ 4,281
Earnings per share:
Net income per share — Basic	$ 0.06	$ 0.09	$ 0.08	$ 0.40
Weighted average shares outstanding — Basic	10,760	10,759	10,760	10,755
Net income per share — Diluted	$ 0.06	$ 0.09	$ 0.08	$ 0.39
Weighted average shares outstanding — Diluted	10,760	10,957	10,760	10,916