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Costs Associated with Exit and Restructuring Activities -Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($) Facility	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($) Facility	Dec. 31, 2019 USD ($)	Dec. 31, 2017 USD ($)
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 1,041,000	$ 2,342,000	$ 1,416,000	$ 5,337,000
Restructuring reserve	1,494,000		1,494,000		$ 1,993,000
Workforce Reduction
Restructuring Cost And Reserve [Line Items]
Restructuring charges	33,000		440,000
Facilities
Restructuring Cost And Reserve [Line Items]
Restructuring charges		$ 1,671,000		$ 1,671,000
Restructuring and related cost, number of facilities | Facility		3		3
Lease Termination | Quality Thermistor, Inc.
Restructuring Cost And Reserve [Line Items]
Restructuring charges		$ 800,000		$ 800,000
Workforce and Building Relocation
Restructuring Cost And Reserve [Line Items]
Restructuring charges		$ 871,000		$ 871,000
Workforce and Building Relocation | Foreign
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost, number of facilities | Facility		2		2
Other Charges
Restructuring Cost And Reserve [Line Items]
Restructuring reserve	14,000		14,000		1,057,000
September 2020 Plan
Restructuring Cost And Reserve [Line Items]
Restructuring charges	1,008,000		1,008,000
Restructuring reserve	583,000		583,000
September 2020 Plan | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost, expected cost of plan	5,000,000		5,000,000
Expected initiatives cost incurred not qualify as restructuring charges	5,000,000		5,000,000
September 2020 Plan | Maximum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost, expected cost of plan	6,000,000		6,000,000
Expected initiatives cost incurred not qualify as restructuring charges	6,000,000		6,000,000
June 2016 Plan
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost, expected cost of plan	13,400,000		13,400,000
Restructuring charges	0	$ 671,000	(32,000)	$ 3,914,000
Restructuring reserve	23,000		23,000		233,000
Restructuring and related cost additional cost						$ 1,100,000
June 2016 Plan | Workforce Reduction
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost, expected cost of plan	3,075,000		3,075,000
June 2016 Plan | Other Charges
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost, expected cost of plan	1,300,000		1,300,000
April 2014 Plan
Restructuring Cost And Reserve [Line Items]
Restructuring charges	0	$ (248,000)	0	$ (248,000)
Restructuring reserve	$ 874,000		$ 874,000		$ 703,000

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