Stock-Based Compensation (Schedule of Share-based Compensation, Stock Options, Activity) (Details) (USD $)	9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012
Options
Options outstanding at beginning of period	111,571	139,446	139,446
Granted	0	5,507
Canceled / forfeited	(18,763)	(16,193)
Exercised		(5,250)
Expired	(5,188)	(10,806)
Options outstanding at end of period	87,620	112,704	111,571	139,446
Options exercisable at end of period	69,126	74,798
Weighted- average exercise price
Options outstanding at beginning of period	$ 38.92	$ 53.66	$ 53.66
Granted		$ 6.80
Exercised		$ 5.70
Canceled / forfeited	$ 30.52	$ 128.43
Expired	$ 125.83	$ 90.72
Options outstanding at end of period	$ 35.67	$ 39.31	$ 38.92	$ 53.66
Options exercisable at end of period	$ 43.50	$ 56.16
Weighted-average remaining contractual term (years), Options outstanding	5 years 10 months 20 days	6 years 5 months 0 days	6 years 2 months 12 days	6 years 2 months 12 days
Weighted-average remaining contractual term (years), Option Granted		9 years 6 months 1 day
Weighted-average remaining contractual term (years), Options exercisable	5 years 3 months 11 days	5 years 4 months 0 days
Aggregate intrinsic value outstanding at beginning of year (in dollars)	$ 0	$ 79,400	$ 79,400
Aggregate intrinsic value Granted (in dollars)		0
Aggregate intrinsic value outstanding at end of year (in dollars)	0	9,900	0	79,400
Aggregate intrinsic value exercisable (in dollars)	$ 0	$ 6,200