Annual report pursuant to section 13 and 15(d)

9. Stock Options and warrants (Details Narrative)

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9. Stock Options and warrants (Details Narrative) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Stock Options
   
Shares available for grant 2,750,442  
Amortization expense on vested options $ 1,904,887 $ 1,802,134
Aggregate intrinsic value outstanding 19,438,106  
Warrant [Member]
   
Amortization expense on vested options 165,539 438,827
Aggregate intrinsic value outstanding 28,411,354  
Future compensation expense on warrants not exercisable $ 310,578