Segment Information - Summarized (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 02, 2017 USD ($)	Mar. 27, 2016 USD ($)	Apr. 02, 2017 USD ($) segment	Mar. 27, 2016 USD ($)
Segment information
Reportable business segments | segment			4
Sales	$ 25,472	$ 24,885	$ 80,498	$ 72,353
Operating costs	26,195	23,358	78,882	69,145
Segment operating (loss) income	(1,884)	327	(1,930)	429
Interest expense, net	(865)	(1,106)	(3,002)	(3,372)
Loss on extinguishment of debt			(723)
Other income (expense) , net	88	(23)	893	71
Non-operating expense	(777)	(1,129)	(2,832)	(3,301)
Loss before income taxes	(2,661)	(802)	(4,762)	(2,872)
Corporate
Segment information
Segment operating (loss) income	(1,161)	(1,200)	(3,546)	(2,779)
Precision Components Group | Total segments
Segment information
Sales	19,878	17,443	59,252	51,626
Operating costs	19,801	15,697	55,741	48,284
Segment operating (loss) income	77	1,746	3,511	3,342
3DMT Group | Total segments
Segment information
Sales	4,292	5,701	17,242	15,905
Operating costs	5,132	6,142	19,438	16,643
Segment operating (loss) income	(840)	(441)	(2,196)	(738)
Flanges and Fittings Group | Total segments
Segment information
Sales	1,272	1,244	3,576	3,565
Operating costs	1,143	1,115	3,158	3,187
Segment operating (loss) income	129	129	418	378
Wireless Group | Total segments
Segment information
Sales	30	497	428	1,257
Operating costs	119	404	545	1,031
Segment operating (loss) income	$ (89)	$ 93	$ (117)	$ 226