Business Combinations - Recognized Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2020	Dec. 31, 2019	Sep. 17, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill		$ 0	$ 27,816		$ 7,576
Goodwill impairment		(27,074)	$ 0
First Source Electronics, LLC
Business Acquisition [Line Items]
Net working capital		2,856		$ 2,856
Property, plant and equipment		503		503
Other long-term assets		1,650		1,650
Definite-lived intangible assets		14,500		14,500
Goodwill		19,828		20,365
Goodwill impairment	$ (537)
Other long-term liabilities		(1,174)		(1,174)
Total consideration		$ 38,163		38,700
Adjustment				$ (537)