Property, Plant and Equipment - Property, Plant and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	$ 115,295	$ 112,230
Less: accumulated depreciation	(6,403)	(5,792)
Property plant and equipment, net	108,892	106,438
Photovoltaic (PV) Solar Systems [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	113,189	110,553
Plant and Machinery [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	110	33
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	454	269
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	75	75
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	1,463	1,296
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	$ 4	$ 4