CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Mar. 30, 2024	Apr. 01, 2023	Mar. 30, 2024	Apr. 01, 2023
Income Statement [Abstract]
Net sales	$ 140,527,000	$ 164,553,000	$ 433,707,000	$ 425,524,000
Cost of sales	132,446,000	150,277,000	403,001,000	391,950,000
Gross profit	8,081,000	14,276,000	30,706,000	33,574,000
Research, development and engineering expenses	2,234,000	2,580,000	6,233,000	7,162,000
Selling, general and administrative expenses	6,422,000	6,961,000	18,263,000	18,353,000
Gain on insurance proceeds, net of losses	0	(396,000)	(431,000)	(4,040,000)
Total operating expenses	8,656,000	9,145,000	24,065,000	21,475,000
Operating income (loss)	(575,000)	5,131,000	6,641,000	12,099,000
Interest expense, net	2,800,000	2,688,000	8,772,000	7,081,000
Income (loss) before income taxes	(3,375,000)	2,443,000	(2,131,000)	5,018,000
Income tax provision (benefit)	(1,154,000)	467,000	(1,329,000)	924,000
Net income (loss)	$ (2,221,000)	$ 1,976,000	$ (802,000)	$ 4,094,000
Net income (loss) per share - Basic (in USD per share)	$ (0.21)	$ 0.18	$ (0.07)	$ 0.38
Weighted average shares outstanding — Basic (in shares)	10,762	10,762	10,762	10,762
Net income (loss) per share - Diluted (in USD per share)	$ (0.21)	$ 0.18	$ (0.07)	$ 0.38
Weighted average shares outstanding — Diluted (in shares)	10,762	10,865	10,762	10,892