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Commitments and Contingencies - Summary of Minimum Future Rentals Receipts under Non-Cancelable Operating Leases (Detail) (USD $)
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Dec. 31, 2013
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| Commitments And Contingencies Disclosure [Abstract] | |
| 2014 | $ 12,498,722 |
| 2015 | 12,440,778 |
| 2016 | 12,401,759 |
| 2017 | 10,539,435 |
| 2018 | 10,601,691 |
| 2019 and thereafter (cumulative) | 70,956,333 |
| Total | $ 129,438,718 |