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Stock Based Awards (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Summary of options and restricted stock activity  
Options, beginning balance 12,760,191
Options, granted   
Options, exercised/vested (315,000)
Options, forfeitures (37,500)
Options, ending balance 12,407,691
Weighted average exercise price of options, beginning balance $ 0.95
Weighted average exercise price of options, granted   
Weighted average exercise price of options, exercised/vested $ 2.37
Weighted average exercise price of options, forfeitures $ 4.23
Weighted average exercise price of options, ending balance $ 0.90
Restricted stock awards, beginning balance 1,281,144
Restricted stock awards, granted 826,849
Restricted stock awards, exercised/vested (69,080)
Restricted stock awards, forfeitures   
Restricted stock awards, ending balance 2,038,913