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Subsequent Events (Details Textual) (USD $) | 3 Months Ended | 42 Months Ended | 1 Months Ended | 3 Months Ended | 1 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 31, 2013 | Nov. 30, 2012 | Apr. 30, 2013 Subsequent Event [Member] | Mar. 31, 2013 Subsequent Event [Member] | Apr. 30, 2013 Silicon Valley Bank [Member] Subsequent Event [Member]
Subsequent events (Textual) [Abstract] |  |  |  |  |
Number of shares of common stock |  |  |  | 83,100 |
Sale of stock, price per share | $ 2.06 |  |  | $ 1.87 | $ 1.7034
Gross proceeds from common stock | $ 1,568,178 | $ 26,700,000 |  | $ 155,000 |
Sales agent is paid compensation up to 3% of gross proceeds | 3.00% |  |  | 3.00% |
Initial term of lease |  |  |  | 3 years |
Net of loan fees approximately |  |  | 9,900,000 |  |
Financial loan interest rate |  |  | 6.00% |  |
Repayment of principal and interest |  |  | $ 1,000,000 |  |
Principal and interest repayment period |  |  |  | 30 months |
Exercisable shares issuance period |  |  |  | 10 years |
Warrant exercise shares |  |  | 293,531 |  |

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