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Derivative Financial Instruments (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified | Jun. 30, 2012 | May 10, 2012 | Dec. 31, 2011 | Nov. 08, 2011 | Apr. 08, 2011 | Oct. 11, 2010
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Derivative Financial Instruments (Textual) [Abstract] |  |  |  |  |  |
Mean prices derived from the stochastic process, multiplied percentage | 110.00% |  |  |  |  |
Issued warrants to acquire common shares |  | 260,417 |  | 1,302,083 | 525,000 | 1,800,000
Shares accessible based upon election to require |  |  |  | 434,027 |  |
Probability of management elect to receive funding |  |  | 60.00% |  |  |
Orginal principal amount |  | $ 8.0 |  |  |  |
Maximum [Member] |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Expected mean selling price, estimated price range | 3.70 |  | 2.63 |  |  |
Minimum [Member] |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Expected mean selling price, estimated price range | 3.54 |  | 2.49 |  |  |

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- Definition Expected mean selling price. + References No definition available. + Details
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- Definition The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16, 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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