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Stockholders' Equity - Summary of Warrants Issued and Outstanding (Detail) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Mar. 29, 2013
Class of Warrant or Right [Line Items] |  |  |
Exercise price of warrants | $ 0.37 | $ 0.37 | $ 0.37
Shares of Common Stock |  | 1,381,113 |
Exercisable Warrants [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Shares of Common Stock |  |  |
Exercisable Warrants [Member] | Warrant 1-1 [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Date of Issuance | Mar. 22, 2012 |  |
Date of Expiration | 2017-03-21 |  |
Exercise price of warrants | $ 0.37 |  |
Shares of Common Stock | 1,381,115 |  |
Exercisable Warrants [Member] | Warrant 1-5 [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Date of Issuance | Oct. 10, 2012 |  |
Date of Expiration | 2017-10-09 |  |
Exercise price of warrants | $ 0.37 |  |
Shares of Common Stock | 5,524,461 |  |
Exercisable Warrants [Member] | Warrant 1-6 [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Date of Issuance | Mar. 29, 2013 |  |
Date of Expiration | 2017-03-21 |  |
Exercise price of warrants | $ 0.37 |  |
Shares of Common Stock | 500,000 |  |
Exercisable Warrants [Member] | Less warrants exercised [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Shares of Common Stock | (7,405,576) |  |
Contingent Warrants [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Shares of Common Stock |  |  |
Contingent Warrants [Member] | Warrant 1-2 [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Date of Issuance | Mar. 22, 2012 |  |
Date of Expiration | 2017-03-21 |  |
Exercise price of warrants | $ 0.37 |  |
Shares of Common Stock | 345,278 |  |
Contingent Warrants [Member] | Warrant 1-3 [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Date of Issuance | Mar. 22, 2012 |  |
Date of Expiration | 2017-03-21 |  |
Exercise price of warrants | $ 0.37 |  |
Shares of Common Stock | 345,278 |  |
Contingent Warrants [Member] | Warrant 1-4 [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Date of Issuance | Mar. 22, 2012 |  |
Date of Expiration | 2017-03-21 |  |
Exercise price of warrants | $ 0.37 |  |
Shares of Common Stock | 690,557 |  |
Contingent Warrants [Member] | Warrants Cancelled [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Shares of Common Stock | (1,381,113) |  |

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