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Acquisitions - Consideration Transferred (Details) - USD ($) $ in Thousands			1 Months Ended	12 Months Ended
	Sep. 14, 2018	May 09, 2018	Oct. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Business Combination, Consideration Transferred [Abstract]
Fair Value of earn-out liability				$ 2,900
Payment of contingent liability				7,219
Echelon Corporation [Member]
Business Combination, Consideration Transferred [Abstract]
Cash consideration	$ 44,100
S3 Asic Semiconductors Limited [Member]
Business Combination, Consideration Transferred [Abstract]
Aggregate consideration		$ 35,000
Earn-out		$ 15,000
Fair Value of earn-out liability				2,900	$ 10,500
Liability reduction				$ 300
Payment of contingent liability			$ 7,200