Warrants (Details 1)	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of warrants outstanding
Exercise Price	3.62	3.53	19.14
Warrants Outstanding	3,035,982	3,235,982	306,388
Range 1 [Member]
Summary of warrants outstanding
Exercise Price	1.50
Warrants Outstanding	571,169
Warrants expiration dates	Jul. 30, 2017
Range 2 [Member]
Summary of warrants outstanding
Exercise Price	2.00
Warrants Outstanding	2,170,925
Warrants expiration dates	Mar. 23, 2015
Range 3 [Member]
Summary of warrants outstanding
Exercise Price	10.00
Warrants Outstanding	5,000
Warrants expiration dates	Apr. 15, 2014
Range 4 [Member]
Summary of warrants outstanding
Exercise Price	15.00
Warrants Outstanding	161,000
Warrants expiration dates	May 30, 2013
Range 5 [Member]
Summary of warrants outstanding
Exercise Price	26.00
Warrants Outstanding	127,888
Warrants expiration dates	May 30, 2013