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8. Stockholder's Equity (Details) (Warrant [Member], USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Beginning balance, shares | 600,000 | 725,000
Warrants issued, shares | 1,734,667 |
Warrants exercised, shares | (250,000) | (125,000)
Warrants expired, shares | (150,000) |
Ending balance, shares | 1,934,667 | 600,000
2013 | 50,000 |
2014 | 1,157,750 |
2015 | 476,917 |
Thereafter | 250,000 |
Total | 1,934,667 |
Maximum [Member] |  |
Beginning balance, Exercise Prices | 0.60 | 0.75
Warrants issued, Exercise Prices | 4.5 | 0.4
Warrants exercised, Exercise Prices | 2.5 |
Warrants expired, Exercise Prices | 0.40 |
Ending balance Exercise Prices | 4.5 | 0.60
Minimum [Member] |  |
Beginning balance, Exercise Prices | 0.30 | 0.20
Warrants issued, Exercise Prices | 2.50 | 0.30
Warrants exercised, Exercise Prices | 0.30 |
Warrants expired, Exercise Prices | 0.30 |
Ending balance Exercise Prices | 0.25 | 0.30

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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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