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Stock-Based Compensation (Details 3) (Warrant [Member], USD $) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2013 | Dec. 31, 2012
Warrant [Member] |  |
Summary of all stock option plans / warrant activity |  |
Number of Options/Warrants Outstanding, Beginning Balance | 4,704,636 |
Warrants, Issued |  |
Warrants, Expired/forfeited |  |
Number of Options/Warrants Outstanding, Exercised | (1,046,211) |
Number of Options/Warrants Outstanding, Ending Balance | 3,658,425 | 4,704,636
Weighted Average Exercise Price, Outstanding, Beginning Balance | $ 1.61 |
Weighted Average Exercise Price, Issued |  |
Weighted Average Exercise Price, Expired/forfeited |  |
Weighted Average Exercise Price, Exercised | $ 1.35 |
Weighted Average Exercise Price, Outstanding, Ending Balance | $ 1.69 | $ 1.61
Weighted Average Remaining Contractual Life, Outstanding and exercisable | 11 months 1 day | 1 year 4 months 28 days
Weighted Average Remaining Contractual Life, Issued |  |
Weighted Average Remaining Contractual Life, Expired/forfeited |  |
Weighted Average Remaining Contractual Life, Exercised |  |

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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + 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)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price of options that were either forfeited or expired. + 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)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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