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Commitments and Contingencies - Additional Information (Detail) (USD $) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2013 | Dec. 31, 2010
Commitments and Contingencies Disclosure [Line Items] |  |
Minimum term of non-cancellable operating leases | 1 year |
Expiration of non-cancellable operating leases maximum year | 2019 |
Financing for leasehold improvement |  | $ 1,100,000
Outstanding liability related to leasehold improvements | 700,000 |
Leasehold Improvements reflected in Accrued liabilities | 100,000 |
Leasehold Improvements reflected in Other non-current liabilities | 600,000 |
Additional Concord Lease |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Early termination of non-cancellable operating leases minimum period | 2015-01 |
Initial term of operating lease | 2 years |
Number of renewal options | 4 |
Renewal period of operating lease | 2 years |
Lease commencement date | Aug. 01, 2013 |
Future rent payment, 2013 | 51,456 |
Future rent payment, 2014 | 154,368 |
Future rent payment, 2015 | $ 90,048 |

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- Definition Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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