Annual report pursuant to Section 13 and 15(d)

Related Party Transactions - Additional Information (Details)

v3.8.0.1
Related Party Transactions - Additional Information (Details) - Enphase - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Related Party Transaction [Line Items]      
Purchase from related party $ 9.1 $ 19.9 $ 11.9
Outstanding payables to related party $ 2.0 $ 0.4