Segment Information - Summarized (Details) $ in Thousands	3 Months Ended
	Oct. 01, 2017 USD ($) segment	Oct. 02, 2016 USD ($)
Segment information
Reportable business segments | segment	3
Sales	$ 19,950	$ 25,712
Operating costs	21,077	24,503
Segment operating income (loss)	(2,064)	(179)
Interest expense, net	(1,012)	(1,107)
Loss on extinguishment of debt		(723)
Other expense , net	(37)	(33)
Non-operating expense	(1,049)	(1,863)
Loss before income taxes	(3,113)	(2,042)
Corporate
Segment information
Segment operating income (loss)	(937)	(1,388)
Precision Components Group | Total segments
Segment information
Sales	14,333	20,004
Operating costs	15,270	18,603
Segment operating income (loss)	(937)	1,401
Stamping Group | Total segments
Segment information
Sales	4,752	5,179
Operating costs	5,001	4,968
Segment operating income (loss)	(249)	211
3DMT Group | Total segments
Segment information
Sales	865	289
Operating costs	806	687
Segment operating income (loss)	$ 59	(398)
Wireless Group | Total segments
Segment information
Sales		240
Operating costs		245
Segment operating income (loss)		$ (5)