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

Deemed dividend to convertible preferred stockholders.

No definition available.

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