Summary of Significant Accounting Policies - Property and Equipment (Details)	12 Months Ended
	Dec. 31, 2016
Furniture and Office Equipment | Minimum
Property and Equipment
Depreciation and amortization estimated useful life	2 years
Furniture and Office Equipment | Maximum
Property and Equipment
Depreciation and amortization estimated useful life	5 years
Leasehold Improvements
Property and Equipment
Depreciation and amortization estimated useful life	5 years
Processing equipment | Minimum
Property and Equipment
Depreciation and amortization estimated useful life	5 years
Processing equipment | Maximum
Property and Equipment
Depreciation and amortization estimated useful life	7 years