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Warrants (Tables) (Warrant [Member]) | 3 Months Ended
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Mar. 31, 2013
Warrant [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Significant assumptions used to measure the fair value of warrants |
| 2013 |  |  | 2012 |
Stock price |  | $ | 0.24 |  |  | $ | 0.37 |
Term | 2.58-5 Years |  |  | 3.58-4.99 Years |
Volatility |  |  | 50 | % |  |  | 50 | %
Risk-free interest rate |  |  | 0.36 – 0.77 | % |  |  | 0.51 | %
Exercise prices |  | $ | 0.25-0.4488 |  |  | $ | 0.25-0.35 |
Dividend yield |  |  | 0.00 | % |  |  | 0.00 | %
Delta |  |  | 0.04-0.08 |  |  |  | 0.08 |
Up ratio |  |  | 1,103-1.144 |  |  |  | 1.144 |
Down ratio |  |  | 0.857-0.897 |  |  |  | 0.857-0.858 |
Up transition probability |  |  | 0.500-0.501 |  |  |  | 0.500 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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