Equity Compensation Plans - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Number of Options
Outstanding, beginning balance (in Shares)	5,204
Granted (in Shares)	85
Exercised (in Shares)	0
Forfeited (in Shares)	(367)
Outstanding, ending balance (in Shares)	4,922	5,204
Options, exercisable (in Shares)	2,413
Weighted Average Exercise Price
Outstanding, beginning balance (in Dollars per share)	$ 14.33
Granted (in Dollars per share)	1.05
Exercised (in Dollars per share)	0
Forfeited (in Dollars per share)	17.41
Outstanding, ending balance (in Dollars per share)	13.87	$ 14.33
Weighted average exercise price, exercisable (in Dollars per share)	$ 22.90
Weighted Average Remaining Contractual Term (Years)
Weighted Average Remaining Contractual Term	6 years 6 months	6 years 9 months 18 days
Weighted Average Remaining Contractual Term, exercisable	4 years 4 months 24 days
Aggregate Intrinsic Value (in thousands)
Aggregate Intrinsic Value	$ 0	$ 0
Aggregate Intrinsic Value, exercisable	$ 0