Net Income (Loss) Per Share - Additional Information (Details) - USD ($) $ in Millions		12 Months Ended
Aug. 10, 2015	Dec. 31, 2016
Series D and E Preferred Shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Deemed dividend to convertible preferred shareholders	$ 24.9	$ 24.9

Deemed dividend to convertible preferred stockholders.

No definition available.

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Namespace Prefix:	run_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration