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Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions An individual who previously served as one of the Company’s directors until March 2017 has direct and indirect ownership interests in Enphase Energy, Inc. (“Enphase”). For the years ended December 31, 2017 and 2016, the Company recorded $9.1 million and $19.9 million, respectively, in purchases from Enphase and had outstanding payables to Enphase of $2.0 million as of December 31, 2017.