Principal Business Activity and Significant Accounting Policies - PPNE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Property, Plant, and Equipment
Depreciation expense	$ 684	$ 375	$ 1,795	$ 1,350
Computer equipment and software
Property, Plant, and Equipment
Estimated useful life			3 years
Buildings
Property, Plant, and Equipment
Estimated useful life			33 years
Equipment | Minimum
Property, Plant, and Equipment
Estimated useful life			3 years
Equipment | Maximum
Property, Plant, and Equipment
Estimated useful life			15 years
Leasehold improvements | Minimum
Property, Plant, and Equipment
Estimated useful life			3 years
Leasehold improvements | Maximum
Property, Plant, and Equipment
Estimated useful life			9 years
Furniture and fixtures | Minimum
Property, Plant, and Equipment
Estimated useful life			8 years
Furniture and fixtures | Maximum
Property, Plant, and Equipment
Estimated useful life			10 years