CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 01, 2022	Dec. 26, 2020	Jan. 01, 2022	Dec. 26, 2020
Income Statement [Abstract]
Net sales	$ 134,456	$ 128,262	$ 267,218	$ 251,469
Cost of sales	124,648	117,640	247,272	230,832
Gross profit	9,808	10,622	19,946	20,637
Operating expenses
Research, development and engineering expenses	2,498	2,392	4,947	4,637
Selling, general and administrative expenses	5,659	5,510	11,254	10,484
Total operating expenses	8,157	7,902	16,201	15,121
Operating income	1,651	2,720	3,745	5,516
Interest expense, net	1,095	848	2,087	1,529
Income before income taxes	556	1,872	1,658	3,987
Income tax provision (benefit)	(31)	292	256	688
Net income	$ 587	$ 1,580	$ 1,402	$ 3,299
Earnings per share:
Net income per share — Basic	$ 0.05	$ 0.15	$ 0.13	$ 0.31
Weighted average shares outstanding — Basic	10,762	10,760	10,762	10,760
Net income per share — Diluted	$ 0.05	$ 0.14	$ 0.13	$ 0.30
Weighted average shares outstanding — Diluted	11,057	11,385	11,055	11,040