Significant Customers (Details) - Customers	3 Months Ended		12 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Jun. 30, 2016
Sales
Significant customers
Concentration percentage	39.40%	34.10%
Receivables
Significant customers
Concentration percentage	35.60%		32.30%
Receivables | Customer 1
Significant customers
Concentration percentage	12.80%		8.30%
Receivables | Customer 2
Significant customers
Concentration percentage	10.70%		10.50%
Receivables | Customer 3
Significant customers
Concentration percentage	6.90%		8.30%
Receivables | Customer 4
Significant customers
Concentration percentage	5.20%		5.20%
Precision Components Group | Sales | Customer 2
Significant customers
Concentration percentage	10.80%	9.10%
Precision Components Group | Sales | Customer 3
Significant customers
Concentration percentage	8.20%	8.00%
Precision Components Group | Sales | Customer 4
Significant customers
Concentration percentage	7.60%	9.60%
3DMT Group | Sales | Customer 1
Significant customers
Concentration percentage	12.80%	7.40%