Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended		8 Months Ended	9 Months Ended
	Aug. 31, 2015 USD ($)	Sep. 28, 2014 USD ($)	Aug. 31, 2015 USD ($) Segment	Sep. 28, 2014 USD ($)	May. 31, 2015 USD ($)	Dec. 28, 2014 USD ($)	Jun. 29, 2014 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Equity method investments, Impairment losses	$ 0		$ 0
Allowance for losses on financing receivables	300,000		300,000			$ 0
Depreciation expense	1,200,000	$ 700,000	2,400,000	$ 1,600,000
Amount of interest capitalized	2,100,000	100,000	3,800,000	1,200,000
Asset retirement obligation	8,450,000		$ 8,450,000		$ 3,868,000
Number of reportable segments | Segment			1
Revenue sales type lease term			20 years
Operating revenues	3,076,000	2,331,000	$ 6,629,000	6,903,000
Operating lease term period			20 years
Estimated residual value over the lease term			20 years
Selling, General and Administrative Expenses
Summary Of Significant Accounting Policies [Line Items]
Share-based compensation expenses	100,000		$ 100,000
Sales Type Lease Revenue
Summary Of Significant Accounting Policies [Line Items]
Net present value of minimum lease payments percentage per contract			90.00%
Operating revenues	$ 0		$ 0
Customer Concentration Risk | Operating Revenues | United States
Summary Of Significant Accounting Policies [Line Items]
Total operating revenues percentage	32.00%		15.00%
Minimum | Inverters
Summary Of Significant Accounting Policies [Line Items]
Product warranty term			5 years
Maximum | Inverters
Summary Of Significant Accounting Policies [Line Items]
Product warranty term			10 years
Workmanship on Installed Systems | Maximum | Inverters
Summary Of Significant Accounting Policies [Line Items]
Product warranty term			10 years
Solar Energy System Performance Warranty
Summary Of Significant Accounting Policies [Line Items]
Product of warranty	$ 275,000	$ 29,000	$ 275,000	$ 29,000	$ 420,000	525,000	$ 39,000
Solar Energy System Performance Warranty | SunPower
Summary Of Significant Accounting Policies [Line Items]
Other current liabilities	1,400,000		1,400,000
Product of warranty	300,000		$ 300,000
Predecessor
Summary Of Significant Accounting Policies [Line Items]
Asset retirement obligation						0
Leased Solar Energy Systems
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life			20 years
Solar Energy Systems
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life			30 years
Solar Panels
Summary Of Significant Accounting Policies [Line Items]
Product warranty term			25 years
Industry standard product warranty term			25 years
Product of warranty	0		$ 0
Finance Leases Portfolio Segment
Summary Of Significant Accounting Policies [Line Items]
Allowance for doubtful accounts related to operating lease	$ 0		$ 0			$ 0