Goodwill and Intangibles - Intangible assets subject to amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,080	$ 3,080
Accumulated Amortization	(2,435)	(1,819)
Net Book Value	645	1,261
Technology
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,080	3,080
Accumulated Amortization	(2,435)	(1,819)
Net Book Value	$ 645	$ 1,261
Weighted Average
Finite Lived Intangible Assets [Line Items]
Weighted Average Remaining Life, Intangible Assets	1 year 1 month 6 days