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Warrants (Details 1) (Warrant [Member], USD $) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Warrant [Member] |  |  |
Summary of warrants activities |  |  |
Number of Units, Beginning balance | 12,770,636 | 5,364,557 |
Number of Units, Granted |  | 7,406,079 | 5,364,557
Number of Units, Ending Balance | 9,535,694 | 12,770,636 | 5,364,557
Weighted Average Exercise Price, Beginning balance | $ 0.97 | $ 0.51 |
Weighted Average Exercise Price, Granted |  | $ 1.32 | $ 0.51
Weighted Average Exercise Price, Ending Balance | $ 0.77 | $ 0.97 | $ 0.51
Weighted Average Remaining Contractual Term (in years), Granted |  | 3 years 9 months 4 days | 6 years 9 months 4 days
Weighted Average Remaining Contractual Term (in years), Outstanding | 5 years 4 months 2 days | 4 years 5 months 23 days | 6 years 9 months 4 days
Aggregate Intrinsic Value, Beginning balance | $ 6,114,768 | $ 3,261,367 |
Aggregate Intrinsic Value, Ending Balance | $ 9,691,302 | $ 6,114,768 | $ 3,261,367

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- Definition Weighted average remaining contractual term for option awards granted, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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 (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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