Annual report pursuant to Section 13 and 15(d)

Income Taxes (Schedule of Deferred Tax Assets) (Details)

v2.4.0.6
Income Taxes (Schedule of Deferred Tax Assets) (Details) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Deferred tax assets:    
Net operating loss carryforwards $ 24,767,569 $ 29,701,483
R&D credit carryforwards 6,546,049 7,610,672
Temporary differences 2,408,108 371,610
Deferred tax assets before valuation allowance 33,721,726 37,683,765
Valuation allowance (33,721,726) (37,683,765)
Net deferred tax assets