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Equity Financings and Warrants (Details Textual) - USD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 16, 2015 | Feb. 07, 2014 | Dec. 31, 2015 | Dec. 31, 2014
Equity Financing And Warrants [Line Items] |  |  |  |
Common stock, shares issued |  |  | 9,051,217 | 3,021,498
Private Investment In Public Entity Transaction |  |  |  |
Equity Financing And Warrants [Line Items] |  |  |  |
Common stock, shares issued | 6,003,082 |  |  |
Warrants available to purchase additional commons shares | 2,401,233 |  |  |
Purchase price for common stock unit | $ 6.1635 |  |  |
Proceeds from the issuance of security units | $ 34.2 |  |  |
Warrants exercisable date |  |  | Dec. 13, 2015 |
Warrants were exercisable upon issuance, expiry date |  |  | Jun. 16, 2022 |
Warrant price per share | $ 6.1012 |  |  |
Private Investment In Public Entity Transaction | Security Units |  |  |  |
Equity Financing And Warrants [Line Items] |  |  |  |
Common stock, shares issued | 6,003,082 |  |  |
Registered Direct Offering |  |  |  |
Equity Financing And Warrants [Line Items] |  |  |  |
Common stock, shares issued |  | 730,890 |  |
Warrants available to purchase additional commons shares |  | 182,722 |  |
Purchase price for common stock unit |  | $ 11.90 |  |
Proceeds from the issuance of security units |  | $ 7.9 |  |
Warrants were exercisable upon issuance, expiry date |  |  | Feb. 07, 2019 |
Warrant price per share |  |  | $ 14.875 |

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- Definition Date the warrants or rights are exercisable, in CCYY-MM-DD format. + 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)(3)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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