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Warrants (Narrative) (Details) (USD $)
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6 Months Ended | 12 Months Ended | |
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Jun. 30, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Number of warrants, Outstanding | 8,676,142 | 8,676,142 | 5,624,583 |
| Exercise price | $ 1.53 | $ 1.53 | $ 1.48 |
| Average remaining contractual life of warrants outstanding | 2 years 10 months 11 days | 3 years 1 month 30 days | |
| Probability of entering into a fundamental transaction | 5.00% | ||
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Maximum [Member]
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| Exercise price | $ 1.90 | ||
| Warrant expiration date, end | Sep. 30, 2016 | ||
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Minimum [Member]
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| Exercise price | $ 1.00 | ||
| Warrant expiration date, start | Aug. 08, 2013 | ||
| X | ||||||||||
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- Definition
Exercise price of the warrants. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The latest date of expiration of warrants held. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The earliest date of expiration of warrants held. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Investment Warrants Weighted Average Remaining Contractual Term No definition available.
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| X | ||||||||||
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- Definition
Probability Of Entering Into A Fundamental Transaction No definition available.
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| X | ||||||||||
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- Definition
Aggregate amount of each class of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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