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Commitments and Contingencies - Summary of Minimum Future Rental Payments under Non-Cancelable Operating Leases (Detail) (USD $)
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Dec. 31, 2013
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| Commitments And Contingencies Disclosure [Abstract] | |
| 2014 | $ 673,653 |
| 2015 | 678,179 |
| 2016 | 494,625 |
| 2017 | 269,528 |
| 2018 | 274,245 |
| 2019 and thereafter (cumulative) | 1,046,698 |
| Total | $ 3,436,928 |