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Commitments and Contingencies - Additional Information (Detail) (USD $) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 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 | 800,000 |
Leasehold Improvements reflected in Accrued liabilities | 100,000 |
Leasehold Improvements reflected in Other non-current liabilities | 700,000 |
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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- Definition Amount of required minimum rental payments maturing in the next fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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