Significant Customers (Details) - Customers			3 Months Ended		9 Months Ended
	Mar. 27, 2016	Jun. 30, 2015	Mar. 27, 2016	Mar. 29, 2015	Mar. 27, 2016	Mar. 29, 2015
Sales
Significant customers
Concentration percentage, disclosure threshold			5.00%
Concentration percentage			44.50%	37.00%	41.60%	35.40%
Receivables
Significant customers
Concentration percentage, disclosure threshold			5.00%
Concentration percentage	30.60%	27.70%
Receivables | Customer 1
Significant customers
Concentration percentage	13.30%	9.00%
Receivables | Customer 2
Significant customers
Concentration percentage	9.50%	6.20%
Receivables | Customer 3
Significant customers
Concentration percentage		7.00%
Receivables | Customer 4
Significant customers
Concentration percentage	7.80%
Receivables | Customer 6
Significant customers
Concentration percentage		5.50%
Precision Components Group | Sales | Customer 1
Significant customers
Concentration percentage			11.00%	8.10%	9.80%	8.10%
Precision Components Group | Sales | Customer 3
Significant customers
Concentration percentage			8.60%	10.20%	8.90%	9.50%
Precision Components Group | Sales | Customer 4
Significant customers
Concentration percentage			7.90%	5.90%	7.70%	7.40%
Precision Components Group | Sales | Customer 5
Significant customers
Concentration percentage			5.80%	6.50%	5.90%	5.20%
Precision Components Group | Sales | Customer 6
Significant customers
Concentration percentage				6.30%		5.20%
3DMT Group | Sales | Customer 2
Significant customers
Concentration percentage			11.20%		9.30%