9. Stock Options and warrants (Details) (Stock Options, USD $)
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12 Months Ended | ||||||||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Dec. 31, 2008
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Dec. 31, 2007
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Dec. 31, 2006
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Dec. 31, 2005
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Dec. 31, 2004
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Stock Options
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Beginning Balance | 24,067,982 | 4,837,488 | 4,851,225 | 4,601,225 | 4,188,445 | 3,999,559 | 6,508,561 | 14,422,652 | 13,250,000 |
Granted | 4,858,000 | 19,800,000 | 181,818 | 333,333 | 2,700,000 | 238,679 | 1,313,605 | 2,085,909 | 1,172,652 |
Exercised | (776,667) | (77,778) | (195,555) | (83,333) | (2,860,000) | ||||
Forfeited or expired | (871,127) | (310,000) | (2,287,220) | (49,793) | (962,607) | ||||
Cancelled | (181,818) | (10,000,000) | |||||||
Ending Balance | 27,278,098 | 24,067,982 | 4,837,488 | 4,851,225 | 4,601,225 | 4,188,445 | 3,999,559 | 6,508,561 | 14,422,652 |
Weighted Average Exercise Price, Outstanding Beginning Balance | $ 0.30 | $ 0.52 | $ 0.52 | $ 0.53 | $ 0.95 | $ 0.99 | $ 0.53 | $ 0.18 | $ 0.11 |
Weighted Average Exercise Price, Granted | $ 0.30 | $ 0.26 | $ 0.55 | $ 0.30 | $ 0.28 | $ 0.55 | $ 1.21 | $ 0.92 | $ 1.03 |
Weighted Average Exercise Price, Exercised | $ 0.47 | $ 0.27 | $ 0.27 | $ 0.27 | $ 0.10 | ||||
Weighted Average Exercise Price, Forfeited or expired | $ 0.98 | $ 0.76 | $ 1.00 | $ 1.96 | $ 0.84 | ||||
Weighted Average Exercise Price, Cancelled | $ 0.55 | $ 0.10 | |||||||
Weighted Average Exercise Price, Outstanding Ending Balance | $ 0.27 | $ 0.30 | $ 0.52 | $ 0.52 | $ 0.53 | $ 0.95 | $ 0.99 | $ 0.53 | $ 0.18 |