Property and Equipment, net - Schedule of Property and Equipment, net (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 66,408	$ 32,790
Less: accumulated depreciation and amortization	(21,542)	(10,595)
Total solar energy systems, net	44,866	22,195
Machinery and Equipment
Property Plant And Equipment [Line Items]
Total property and equipment, gross	2,808	1,031
Leasehold Improvements, Furniture and Computer hardware
Property Plant And Equipment [Line Items]
Total property and equipment, gross	10,669	6,386
Vehicles
Property Plant And Equipment [Line Items]
Total property and equipment, gross	33,048	8,942
Computer Software
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 19,883	$ 16,431