Stock-Based Compensation (Details 1) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Options outstanding Balance at Beginning of year	139,446	144,370
Options outstanding Granted	5,507	19,412
Options Cancelled/forefeited	(3,010)	(17,396)
Options Expired	(10,806)	(8,092)
Options outstanding Balance at end of year	131,137	138,294
Options Exercisable at end of year	92,781	57,032
Weighted-average exercise price Options outstanding Balance at beginning of year	$ 53.39	$ 68.90
Weighted-average exercise price Granted	$ 6.80	$ 4.25
Weighted-average exercise price Cancelled/forefeited	$ 47.20	$ 65.55
Weighted-average exercise price Expired	$ 90.72	$ 68.93
Weighted-average exercise price Options outstanding at end of year	$ 48.50	$ 60.24
Weighted-average exercise price Options Exercisable at end of year	$ 66.45	$ 138.45
Weighted-average remaining contractual term (years), Options outstanding	6 years 2 months 12 days	5 years 10 months 24 days
Weighted-average remaining contractual term (years), Option Granted	10 years	9 years 10 months 24 days
Weighted-average remaining contractual term (years), Options outstanding	6 years 7 months 6 days	6 years 7 months 6 days
Weighted-average remaining contractual term (years), Options exercisable	5 years 6 months	3 years 10 months 24 days
Aggregate intrinsic value outstanding at beginning of year	$ 79,400	$ 0
Aggregate intrinsic value Granted	$ 0	$ 27,800
Aggregate intrinsic value outstanding at end of year	88,200	27,800
Aggregate intrinsic value exercisable	$ 56,800	$ 0