Stock-Based Compensation (Schedule of Share-based Compensation, Stock Options, Activity) (Details) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 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	(2,227)	(8,090)
Expired	(4,569)	(10,806)
Options outstanding at end of period	104,775	126,057	111,571	139,446
Options exercisable at end of period	86,281	88,151
Weighted- average exercise price
Options outstanding at beginning of period	$ 38.92	$ 53.66	$ 53.66
Granted		$ 6.80
Canceled / forfeited	$ 70.21	$ 110.67
Expired	$ 129.60	$ 90.72
Options outstanding at end of period	$ 34.30	$ 44.78	$ 38.92	$ 53.66
Options exercisable at end of period	$ 40.38	$ 61.43
Weighted-average remaining contractual term (years), Options outstanding	5 years 11 months 28 days	6 years 6 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 8 months 13 days
Weighted-average remaining contractual term (years), Options exercisable	5 years 5 months 20 days	5 years 4 months 26 days
Aggregate intrinsic value outstanding at beginning of year	$ 0	$ 79,400	$ 79,400
Aggregate intrinsic value Granted		0
Aggregate intrinsic value outstanding at end of year	0	40,900	0	79,400
Aggregate intrinsic value exercisable	$ 0	$ 27,300