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Equity Financings and Warrants (Details Textual) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2014 | Dec. 31, 2013
Equity financings and warrants (Textual) [Abstract] |  |
Number of warrants outstanding | 9,400,000 |
Class of warrant or rights expiration date earliest. | 2016-04 |
Class of warrant or rights expiration date latest | 2020-01 |
Minimum |  |
Equity financings and warrants (Textual) [Abstract] |  |
Warrant price per share | $ 1.60 |
Maximum |  |
Equity financings and warrants (Textual) [Abstract] |  |
Warrant price per share | $ 116.89 |
Weighted Average |  |
Equity financings and warrants (Textual) [Abstract] |  |
Warrant price per share | $ 2.31 |
PIPE Transaction |  |
Equity financings and warrants (Textual) [Abstract] |  |
Aggregate common stock sold |  | 356,430
Warrants available to purchase additional commons shares |  | 249,501
Aggregate gross proceeds |  | $ 1,000,000
Proceeds from the issuance of common stock |  | 805,000
Public Equity Offering Close Date |  | Jan. 25, 2013
Subscription agreement date |  | Jan. 22, 2013
Purchase price for common stock unit |  | $ 2.81
Warrant coverage ratio |  | 0.70
Warrant price per share |  | $ 2.28
Closing bid price of the common stock |  | 100.00%
Warrants were exercisable upon issuance, expiry year |  | 7 years
Closing bid price date |  | Jan. 22, 2013
Registered Direct Offering |  |
Equity financings and warrants (Textual) [Abstract] |  |
Aggregate common stock sold | 5,116,228 | 164,636
Warrants available to purchase additional commons shares | 1,279,057 | 65,855
Aggregate gross proceeds | 8,700,000 | 730,000
Proceeds from the issuance of common stock | 7,900,000 | 616,000
Public Equity Offering Close Date | Feb. 07, 2014 | Feb. 04, 2013
Subscription agreement date |  | Jan. 31, 2013
Purchase price for common stock unit | $ 1.70 | $ 4.43
Warrant coverage ratio | 0.25 | 0.40
Warrant price per share | $ 2.125 | $ 4.13
Closing bid price of the common stock | 125.00% |
Warrants were exercisable upon issuance, expiry year | 5 years | 5 years
Closing bid price date | Feb. 03, 2014 | Jan. 31, 2013
Public Offering | Series A Convertible Preferred Stock |  |
Equity financings and warrants (Textual) [Abstract] |  |
Aggregate common stock sold |  | 125,000
Warrants available to purchase additional commons shares |  | 6,250,000
Aggregate gross proceeds |  | 20,000,000
Proceeds from the issuance of common stock |  | 17,900,000
Purchase price for common stock unit |  | $ 160
Warrant coverage ratio |  | 50
Warrant price per share |  | $ 1.60
Warrants were exercisable upon issuance, expiry year |  | 5 years
Common stock shares issued upon conversion of each share of convertible preferred stock |  | 100
Preferred stock liquidation preference per share |  | $ 0.001
Percentage of total number of shares of common stock then issued and outstanding limit on beneficial ownership |  | 9.99%
Intrinsic value of embedded beneficial conversion feature |  | $ 2,000,000
Public Offering | Director and Chief Executive Officer |  |
Equity financings and warrants (Textual) [Abstract] |  |
Warrants available to purchase additional commons shares |  | 39,050
Preferred Stock Purchased by Officer |  | 781

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