Warrants (Details 2)	6 Months Ended
	Jun. 30, 2012
Warrant Activity
Outstanding Warrants	4,867,478
Exercisable Warrants	4,867,478
Exercise Price Range One [Member]
Warrant Activity
Exercise price of warrants issued	0.0018
Outstanding Warrants	2,778
Weighted Average Remaining Contractual Life Warrants
Exercisable Warrants	2,778
Exercise Price Range Two [Member]
Warrant Activity
Exercise price of warrants issued	1.0074
Outstanding Warrants	39,705
Weighted Average Remaining Contractual Life Warrants	4 months 24 days
Exercisable Warrants	39,705
Exercise Price Range Three [Member]
Warrant Activity
Exercise price of warrants issued	6.84
Outstanding Warrants	167
Weighted Average Remaining Contractual Life Warrants
Exercisable Warrants	167
Exercise Price Range Four [Member]
Warrant Activity
Exercise price of warrants issued	6.96
Outstanding Warrants	2,354,034
Weighted Average Remaining Contractual Life Warrants	2 years 1 month 6 days
Exercisable Warrants	2,354,034
Exercise Price Range Five [Member]
Warrant Activity
Exercise price of warrants issued	8.70
Outstanding Warrants	11,024
Weighted Average Remaining Contractual Life Warrants	1 year 7 months 6 days
Exercisable Warrants	11,024
Exercise Price Range Six [Member]
Warrant Activity
Exercise price of warrants issued	10.68
Outstanding Warrants	1,568,385
Weighted Average Remaining Contractual Life Warrants	2 years 2 months 12 days
Exercisable Warrants	1,568,385
Exercise Price Range Seven [Member]
Warrant Activity
Exercise price of warrants issued	14.70
Outstanding Warrants	891,385
Weighted Average Remaining Contractual Life Warrants	6 months
Exercisable Warrants	891,385