Summary of Significant Accounting Policies - PP&E (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property and equipment
Depreciation and amortization	$ 305	$ 236
Equipment and furniture and fixtures | Minimum
Property and equipment
Estimated useful lives	1 year
Equipment and furniture and fixtures | Maximum
Property and equipment
Estimated useful lives	5 years
Leasehold improvements | Minimum
Property and equipment
Estimated useful lives	2 years
Leasehold improvements | Maximum
Property and equipment
Estimated useful lives	5 years