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Stock Purchase Warrants (Details Textual) (USD $) | 3 Months Ended | 9 Months Ended | 1 Months Ended |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 General and Administrative Expenses and Research and Development Expense [Member] | Sep. 30, 2013 General and Administrative Expenses and Research and Development Expense [Member] | Sep. 30, 2014 General and Administrative Expenses and Research and Development Expense [Member] | Sep. 30, 2013 General and Administrative Expenses and Research and Development Expense [Member] | Oct. 25, 2012 Warrant [Member] | Mar. 15, 2012 Warrant [Member] | Dec. 20, 2011 Warrant [Member] | Sep. 30, 2014 Warrant [Member] | Sep. 30, 2014 Warrant [Member] General and Administrative Expenses and Research and Development Expense [Member] | Sep. 30, 2013 Warrant [Member] General and Administrative Expenses and Research and Development Expense [Member] | Sep. 30, 2014 Warrant [Member] General and Administrative Expenses and Research and Development Expense [Member] | Sep. 30, 2013 Warrant [Member] General and Administrative Expenses and Research and Development Expense [Member]
Issuance Of Warrants To Purchase Of Common Stock |  |  |  |  | 635,855 |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  |  |  | $ 1.60 |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Warrants Exercisable Number |  |  |  |  |  | 250,000 | 100,000 |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Warrants Vested and Expected To Vest Outstanding Number |  |  |  |  |  | 50,000 |  |  |  |  |  |
Warrants Exercisable Price Per Share |  |  |  |  |  | $ 2.20 | $ 1.14 |  |  |  |  |
Investment Warrants Expiration Date1 |  |  |  |  | Oct. 25, 2017 | Mar. 14, 2014 |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Warrants Exercisable In Period |  |  |  |  | 5 years | 2 years | 5 years |  |  |  |  |
Allocated Share-based Compensation Expense | $ 610,000 | $ 338,000 | $ 1,800,000 | $ 1,200,000 |  |  |  |  | $ 0 | $ 0 | $ 0 | $ 22,000
Class of Warrant or Right, Outstanding |  |  |  |  |  |  |  | 316,522 |  |  |  |

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- Definition Expiration date of warrants held. + References No definition available. + Details
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- Definition Warrants issued to purchase common stock. + References No definition available. + Details
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- Definition Exercisable term of warrants. + References No definition available. + Details
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- Definition The number of exercisable share warrants that may be converted as of the balance sheet date. + References No definition available. + Details
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- Definition The number of warrants which fully vested and expected to vest stock options outstanding can be converted under the option plan. + References No definition available. + Details
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- Definition Warrants exercisable price per share. + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Number of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Article 4 + Details
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