Summary of Significant Accounting Policies - Schedule of Property and Equipment Useful Lives (Detail)	12 Months Ended
	Dec. 31, 2015
Vehicles [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Useful lives of property and equipment	5 years
Vehicles [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Useful lives of property and equipment	7 years
Computer equipment [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Useful lives of property and equipment	3 years
Computer equipment [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Useful lives of property and equipment	5 years
Office furniture and fixtures [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Useful lives of property and equipment	5 years
Office furniture and fixtures [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Useful lives of property and equipment	7 years
Machinery and equipment [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Useful lives of property and equipment	5 years
Machinery and equipment [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Useful lives of property and equipment	7 years
Leasehold improvements [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Useful lives of property and equipment	5 years
Leasehold improvements [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Useful lives of property and equipment	7 years