Summary of Significant Accounting Policies - Depreciated Property and Equipment, Net Estimated Useful Lives (Details)	12 Months Ended
	Dec. 31, 2016
Leasehold Improvements
Property Plant And Equipment [Line Items]
Estimated useful life, description	Lesser of estimated useful life of the asset or lease term, which is typically 2 to 6 years
Leasehold Improvements | Minimum
Property Plant And Equipment [Line Items]
Estimated useful life	2 years
Leasehold Improvements | Maximum
Property Plant And Equipment [Line Items]
Estimated useful life	6 years
Furniture
Property Plant And Equipment [Line Items]
Estimated useful life	5 years
Computer Hardware and Software
Property Plant And Equipment [Line Items]
Estimated useful life	3 years
Machinery and Equipment
Property Plant And Equipment [Line Items]
Estimated useful life, description	Lesser of 5 years or lease term
Machinery and Equipment | Maximum
Property Plant And Equipment [Line Items]
Estimated useful life	5 years
Automobiles
Property Plant And Equipment [Line Items]
Estimated useful life, description	Lease term