Restructuring and Related Costs (Narrative) (Details)	3 Months Ended			6 Months Ended	9 Months Ended
	Apr. 01, 2017 USD ($)	Oct. 01, 2016 USD ($) employee	Jul. 02, 2016 employee	Apr. 01, 2017 USD ($)	Jul. 01, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 1,872,000		$ 944,000
2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee			61
Restructuring Charges	$ 0			0
2014 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0			0
Machida, Japan [Member] | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee		35
Restructuring Charges	$ 381,000			$ 944,000
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 1,352,000
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 520,000
Scenario, Forecast [Member] | Machida, Japan [Member] | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					$ 100,000