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Consolidated Statement of Stockholders' Equity (Parenthetical) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Issuance cost on issuance of common stock and warrants $ 1,522,083 $ 480,835 $ 1,351,487
Common Stock
     
Issuance cost on issuance of common stock and warrants 1,522,083 480,835 1,351,487
Additional Paid-in Capital
     
Issuance cost on issuance of common stock and warrants $ 1,522,083 $ 480,835 $ 1,351,487