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Warrants (Details 1)
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Mar. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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|---|---|---|---|
| Summary of warrants outstanding | |||
| Exercise Price | 3.62 | 3.53 | 19.14 |
| Warrants Outstanding | 3,035,982 | 3,235,982 | 306,388 |
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Range 1 [Member]
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| Summary of warrants outstanding | |||
| Exercise Price | 1.50 | ||
| Warrants Outstanding | 571,169 | ||
| Warrants expiration dates | Jul. 30, 2017 | ||
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Range 2 [Member]
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| Summary of warrants outstanding | |||
| Exercise Price | 2.00 | ||
| Warrants Outstanding | 2,170,925 | ||
| Warrants expiration dates | Mar. 23, 2015 | ||
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Range 3 [Member]
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| Summary of warrants outstanding | |||
| Exercise Price | 10.00 | ||
| Warrants Outstanding | 5,000 | ||
| Warrants expiration dates | Apr. 15, 2014 | ||
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Range 4 [Member]
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|||
| Summary of warrants outstanding | |||
| Exercise Price | 15.00 | ||
| Warrants Outstanding | 161,000 | ||
| Warrants expiration dates | May 30, 2013 | ||
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Range 5 [Member]
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| Summary of warrants outstanding | |||
| Exercise Price | 26.00 | ||
| Warrants Outstanding | 127,888 | ||
| Warrants expiration dates | May 30, 2013 |