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Related Party Transactions	9 Months Ended
Related Party Transactions	Sep. 30, 2017
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 three months ended September 30, 2017 and 2016, the Company recorded $2.2 million and $4.3 million, respectively, and $6.6 million and $18.7 million for the nine months ended September 30, 2017 and 2016, respectively, in purchases from Enphase and had outstanding payables to Enphase of $2.1 million and $0.4 million as of September 30, 2017 and December 31, 2016, respectively.