CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 01, 2018	Apr. 02, 2017	Apr. 01, 2018	Apr. 02, 2017
Income Statement [Abstract]
Net sales	$ 93,938	$ 95,410	$ 274,520	$ 293,176
Cost of goods sold	76,262	78,495	221,827	243,078
Gross profit	17,676	16,915	52,693	50,098
Operating expense:
Selling and administrative expenses	13,253	12,862	42,532	39,198
Internal research and development expenses	307	424	1,548	1,308
Amortization of intangible assets	1,802	2,099	5,618	6,509
Total operating expense	15,362	15,385	49,698	47,015
Operating income	2,314	1,530	2,995	3,083
Other income (expense)
Interest expense, net	(1,460)	(1,075)	(4,233)	(3,327)
Other, net	0	20	3	29
Total other expense, net	(1,460)	(1,055)	(4,230)	(3,298)
Income (loss) before income taxes	854	475	(1,235)	(215)
Income taxes	239	46	10,036	155
Net income (loss)	$ 615	$ 429	$ (11,271)	$ (370)
Income (loss) per share of common stock:
Basic (in dollars per share)	$ 0.06	$ 0.04	$ (1.15)	$ (0.04)
Diluted (in dollars per share)	$ 0.06	$ 0.04	$ (1.15)	$ (0.04)
Weighted average shares of common stock outstanding:
Basic (in shares)	9,834,723	9,818,789	9,834,723	9,804,908
Diluted (in shares)	9,834,723	9,818,789	9,834,723	9,804,908