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10. Stock Based Compensation (Details 1) (USD $) | 6 Months Ended
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Jun. 30, 2013 | Jun. 30, 2012
Stock Based Compensation Details 1 |  |
Dividend-yield | 0.00% | 0.00%
Risk-free interest rate | 0.18-0.42 | 1.22-3.66
Expected volatility | 74.83-142.90 | 58.88-120.90
Expected life (years), min | 5 years | 2 months 12 days
Expected life (years), max | 3 months 18 days | 4 years
Weighted average fair value per share of common stock, min | $ 0.08 | $ 0.56
Weighted average fair value per share of common stock, max | $ 0.32 |

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