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Status of the warrants (Details) (USD $)
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12 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2007
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Dec. 30, 2006
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Dec. 31, 2011
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Dec. 31, 2011
Warrant [Member]
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Dec. 31, 2010
Warrant [Member]
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Dec. 31, 2009
Warrant [Member]
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Dec. 31, 2008
Warrant [Member]
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Dec. 31, 2007
Warrant [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||
| Outstanding | 1,229,659 | 6,886,694 | 6,813,494 | 7,386,694 | 7,386,694 | 200,000 | ||
| Issued during the year - Warrants | 428,581 | 500,000 | 100,000 | 0 | 7,186,694 | |||
| Cancelled during the year - Warrants | (426,800) | (673,200) | ||||||
| Expired during the year - Options | (200,000) | |||||||
| Outstanding | 1,229,659 | 7,115,275 | 6,886,694 | 6,813,494 | 7,386,694 | 7,386,694 | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number | 767,159 | 7,115,275 | 6,886,694 | 6,813,494 | 7,386,694 | 7,386,694 | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price | $ 3.21 | $ 2.85 | $ 3.03 | $ 3.02 | $ 3.02 | $ 5.00 | ||
| Issued during the year - Weighted Average Exercise Price | $ 3.20 | $ 2.00 | $ 0.55 | $ 0.50 | $ 3.00 | $ 0 | $ 2.96 | |
| Cancelled during the year - Weighted Average Exercise Price | $ (2.92) | $ (2.90) | ||||||
| Expired during the year - Weighted Average Exercise Price | $ 5.00 | |||||||
| Outstanding - Weighted Average Exercise Price | $ 3.21 | $ 2.65 | $ 2.85 | $ 3.03 | $ 3.02 | $ 3.02 | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price | $ 3.21 | $ 2.65 | $ 2.85 | $ 3.03 | $ 3.02 | $ 3.02 | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term | 1 year 2 months 12 days | 1 year 11 months 22 days | 2 years 9 months 3 days | 3 years 7 months 6 days | 4 years 7 months 6 days | |||
| Exercisable - Weighted Average Remaining Contractual Term (Years) | 1 year 2 months 12 days | 1 year 11 months 22 days | 2 years 9 months 3 days | 3 years 7 months 6 days | 4 years 7 months 6 days | |||