Business Combinations - Consideration Transferred (Details) - USD ($) $ in Thousands	Sep. 17, 2019	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Excess of total consideration over net assets acquired		$ 0	$ 27,816		$ 7,576
First Source Electronics, LLC
Business Acquisition [Line Items]
Initial cash paid, net of working capital adjustment	$ 34,000
Purchase price adjustment	(537)	(500)
Earnout liability	4,700
Total consideration	38,163
Net assets at fair value	18,335
Excess of total consideration over net assets acquired	$ 19,828	$ 19,828		$ 20,365