Segment Information - Summarized (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 01, 2017 USD ($)	Dec. 27, 2015 USD ($)	Jan. 01, 2017 USD ($) segment	Dec. 27, 2015 USD ($)
Segment information
Reportable business segments | segment			4
Sales	$ 28,200	$ 23,837	$ 55,026	$ 47,468
Operating costs	27,201	23,062	52,687	45,788
Segment operating income (loss)	3	4	(45)	101
Interest expense, net	(1,030)	(1,126)	(2,137)	(2,266)
Loss on extinguishment of debt			(723)
Other income, net	837	91	804	94
Non-operating expense	(193)	(1,035)	(2,056)	(2,172)
Loss before income taxes	(190)	(1,031)	(2,101)	(2,071)
Corporate
Segment information
Segment operating income (loss)	(996)	(771)	(2,384)	(1,579)
Precision Components Group | Total segments
Segment information
Sales	20,042	17,113	39,374	34,182
Operating costs	18,506	16,316	35,941	32,577
Segment operating income (loss)	1,536	797	3,433	1,605
3DMT Group | Total segments
Segment information
Sales	6,810	5,149	12,950	10,205
Operating costs	7,483	5,303	14,306	10,512
Segment operating income (loss)	(673)	(154)	(1,356)	(307)
Flanges and Fittings Group | Total segments
Segment information
Sales	1,191	1,149	2,304	2,321
Operating costs	1,032	1,104	2,015	2,072
Segment operating income (loss)	159	45	289	249
Wireless Group | Total segments
Segment information
Sales	157	426	398	760
Operating costs	180	339	425	627
Segment operating income (loss)	$ (23)	$ 87	$ (27)	$ 133