Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 1,481	$ 1,460
Accumulated amortization	(466)	(379)
Intangibles, net	1,015	1,081
Intangible asset amortization	100	100	$ 100
Finite-lived intangible assets, amortization expense, next 12 months	100
Finite-lived intangible assets, amortization expense, year two	100
Finite-lived intangible assets, amortization expense, year three	100
Finite-lived intangible assets, amortization expense, year four	100
Finite-lived intangible assets, amortization expense, year five	100
Patents
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	1,102	1,081
Licenses
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 379	$ 379