Stock-Based Compensation (Schedule of Share-based Compensation, Stock Options, Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Options
Options outstanding at beginning of period (in shares)	85,901
Granted (in shares)	3,300,000	0
Canceled / forfeited (in shares)	(8,011)
Expired (in shares)	(1,691)
Options outstanding at end of period (in shares)	3,376,199		85,901
Options exercisable at end of period (in shares)	63,212
Weighted- average exercise price
Options outstanding at beginning of period ( in dollars per share)	$ 34.86
Granted (in dollars per share)	4.79
Canceled / forfeited (in dollars per share)	19.52
Expired (in dollars per share)	151.20
Options outstanding at end of period (in dollars per share)	5.45		$ 34.86
Options exercisable at end of period (in dollars per share)	$ 39.72
Options, Additional Disclosures
Weighted-average remaining contractual term (years), Options outstanding	9 years 2 months 12 days		5 years 8 months 4 days
Weighted-average remaining contractual term (years), granted	9 years 3 months 18 days
Weighted-average remaining contractual term (years), Options exercisable	4 years 6 months
Aggregate intrinsic value outstanding	$ 2		$ 0
Aggregate intrinsic value, granted	2
Aggregate intrinsic value exercisable	$ 0