Summary of Significant Accounting Policies and Procedures - Schedule of Changes in Accrued Warranty Balance (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Product Liability Contingency [Line Items]
Increase in liability (including $16,983 related to MyPower contracts)	$ 18,929	$ 2,022
MyPower Program [Member]
Product Liability Contingency [Line Items]
Increase in liability (including $16,983 related to MyPower contracts)	$ 16,983

Represents the aggregate increase in the liability for accruals related to standard and extended product warranties issued during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph ((c)(3))
-URI http://asc.fasb.org/extlink&oid=51674963&loc=d3e12565-110249

Name:	us-gaap_ProductWarrantyAccrualWarrantiesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration