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Note Payable - Additional Information (Detail) (USD $)
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3 Months Ended | 12 Months Ended | 91 Months Ended | 94 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Dec. 31, 2013
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Apr. 19, 2013
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Sep. 30, 2013
Warrant
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Sep. 30, 2013
Massachusetts Life Sciences Center
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Sep. 30, 2013
Massachusetts Life Sciences Center
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| Note Payable [Line Items] | ||||||||||
| Subordinated Debt | $ 1,000,000 | $ 1,000,000 | ||||||||
| Debt Instrument, Payment Terms | The loan bears interest at a rate of 10% per annum, and will become fully due and payable on the earlier of (i) September 30, 2018, (ii) the occurrence of an event of default under the MLSC Loan Agreement, or (iii) the completion of a sale of substantially all of our assets, a change-of-control transaction or one or more financing transactions in which we receive net proceeds of $5,000,000 or more in a 12-month period. | |||||||||
| Warrants Issued To Purchase Of Common Stock | 145,985 | 145,985 | ||||||||
| Class of Warrant or Right, Exercise Price of Warrants or Rights | 0.75 | 0.27 | 0.27 | |||||||
| Class Of Warrant Or Right Expiration Date | Sep. 30, 2023 | Sep. 30, 2023 | ||||||||
| Notes Payable, Total | 944,707 | 944,707 | ||||||||
| Adjustments to Additional Paid in Capital, Warrant Issued | 55,293 | |||||||||
| Fair Value Assumptions, Risk Free Interest Rate | 2.64% | |||||||||
| Fair Value Assumptions, Expected Dividend Rate | 0.00% | |||||||||
| Fair Value Assumptions, Expected Term | 10 years | |||||||||
| Fair Value Assumptions, Expected Volatility Rate | 114.00% | |||||||||
| Interest Expense, Total | $ 27,765 | $ 42,981 | $ 108,879 | $ 156,865 | $ 588,597 | $ 616,361 | ||||