Segment Information - Summarized (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2018 USD ($) segment	Jun. 30, 2017 USD ($)
Segment information
Reportable business segments | segment	3
Sales	$ 82,438	$ 99,069
Operating costs	88,643	106,416
Segment operating loss	(9,612)	(12,744)
Interest expense, net	(3,625)	(4,008)
Loss on extinguishment of debt		(723)
Other income, net	298	670
Non-operating expense	(3,327)	(4,061)
Loss before income taxes	(12,939)	(16,805)
Capital expenditures	5,666	6,641
Depreciation and amortization	10,223	9,930
Assets	89,933	99,623
Corporate
Segment information
Segment operating loss	(3,407)	(5,397)
Assets	27,003	30,889
Precision Components Group
Segment information
Capital expenditures	4,463	4,710
Depreciation and amortization	6,938	6,750
Precision Components Group | Total segments
Segment information
Sales	60,643	75,053
Operating costs	64,592	80,133
Segment operating loss	(3,949)	(5,080)
Assets	46,945	50,641
Stamping Group
Segment information
Capital expenditures	1,186	1,292
Depreciation and amortization	2,496	2,323
Stamping Group | Total segments
Segment information
Sales	19,376	21,061
Operating costs	19,698	21,766
Segment operating loss	(322)	(705)
Assets	19,518	19,944
3DMT Group
Segment information
Capital expenditures	17	568
Depreciation and amortization	789	765
3DMT Group | Total segments
Segment information
Sales	2,419	2,528
Operating costs	4,353	3,963
Segment operating loss	(1,934)	(1,435)
Assets	(1,105)	(3,033)
Flanges and Fittings Group
Segment information
Capital expenditures		71
Depreciation and amortization		73
Flanges and Fittings Group | Total segments
Segment information
Assets	$ (2,428)	1,182
Wireless Group
Segment information
Depreciation and amortization		19
Wireless Group | Total segments
Segment information
Sales		427
Operating costs		554
Segment operating loss		$ (127)