Summary of Significant Accounting Policies (Detail 5)	12 Months Ended
	Dec. 31, 2018
Furniture and Fixtures [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives	7 Years
InformationSystems [ Member ]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives	3 Years
Leasehold Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives	Lesser of life of lease or economic life
Machinery and Equipment [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives	10 Years
Machinery and Equipment [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives	3 Years
Buildings [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives	39 Years