Fair Value Measurements - Assumptions (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) company	Dec. 31, 2015 company
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Volatility, basket of companies | company	4	15
Warrants
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Warrants	$ 3,792
Volatility (as a percent)	61.30%
Warrant valuation increase	$ 100