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Restructuring and Other Activities - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost And Reserve [Line Items]
One-time employee termination benefits		$ 6,100,000
Outstanding restructuring liability		600,000
Intangible assets impairment		26,000,000	$ 0	$ 0
Uninstalled Commercial Project [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charge	$ 16,100,000
Litigation Matter [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charge		20,200,000
Tesla [Member]
Restructuring Cost And Reserve [Line Items]
Direct costs from acquisition		23,600,000
Manufacturing Operations - United States [Member] \| Manufacturing and Lab Equipment [Member]
Restructuring Cost And Reserve [Line Items]
Asset impairment charges		$ 13,900,000