Restructuring and Acquisition Related Costs - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Sep. 27, 2019	Mar. 29, 2019	Mar. 30, 2018	Dec. 31, 2019
Restructuring and Acquisition Related Costs [Line Items]
Restructuring costs		$ 1,236
Acquisition and related charges		818	$ 25
Precision Motion | Finders' Fees, Legal, Valuation And Other Professional Or Consulting Fees
Restructuring and Acquisition Related Costs [Line Items]
Acquisition and related charges		300	$ 100
Precision Motion | Earn-out Agreement
Restructuring and Acquisition Related Costs [Line Items]
Acquisition and related charges		$ 500
2019 Restructuring
Restructuring and Acquisition Related Costs [Line Items]
Restructuring and related cost description		During the fourth quarter of 2018, the Company implemented a restructuring plan intended to realign operations, reduce costs, achieve operational efficiencies and focus resources on growth initiatives. During the three months ended March 29, 2019, the Company recorded $1.0 million in severance and related costs in connection with the 2019 restructuring plan. As of March 29, 2019, the Company incurred cumulative costs related to this restructuring plan totaling $1.3 million. The Company anticipates completing the 2019 restructuring program in 2019 and expects to incur additional restructuring charges of $1.0 million to $2.5 million related to the 2019 restructuring program
Restructuring costs		$ 967
Restructuring cumulative costs incurred		1,300
2019 Restructuring | Vision
Restructuring and Acquisition Related Costs [Line Items]
Restructuring costs		350
2019 Restructuring | Precision Motion
Restructuring and Acquisition Related Costs [Line Items]
Restructuring costs		47
2019 Restructuring | Severance Costs
Restructuring and Acquisition Related Costs [Line Items]
Restructuring costs		1,000
2019 Restructuring | Additional Restructuring Costs | Minimum | Scenario, Forecast
Restructuring and Acquisition Related Costs [Line Items]
Restructuring costs				$ 1,000
2019 Restructuring | Additional Restructuring Costs | Maximum | Scenario, Forecast
Restructuring and Acquisition Related Costs [Line Items]
Restructuring costs				$ 2,500
2018 Restructuring
Restructuring and Acquisition Related Costs [Line Items]
Restructuring costs		269
Restructuring cumulative costs incurred		$ 1,900
2018 Restructuring | Vision
Restructuring and Acquisition Related Costs [Line Items]
Restructuring and related cost description		During the second quarter of 2018, the Company initiated a program to integrate manufacturing operations as a result of recent acquisition activities. During the three months ended March 29, 2019, the Company recorded $0.3 million in severance and related costs in connection with the 2018 restructuring plan. These costs were reported in the Vision reportable segment. As of March 29, 2019, the Company incurred cumulative costs related to this restructuring plan totaling $1.9 million. The Company anticipates completing the 2018 restructuring program during the third quarter of 2019 and expects to incur additional restructuring charges of $0.7 million to $1.0 million related to the 2018 restructuring program in the Vision reportable segment.
2018 Restructuring | Severance Costs | Vision
Restructuring and Acquisition Related Costs [Line Items]
Restructuring costs		$ 300
2018 Restructuring | Additional Restructuring Costs | Minimum | Scenario, Forecast | Vision
Restructuring and Acquisition Related Costs [Line Items]
Restructuring costs	$ 700
2018 Restructuring | Additional Restructuring Costs | Maximum | Scenario, Forecast | Vision
Restructuring and Acquisition Related Costs [Line Items]
Restructuring costs	$ 1,000