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Commitments and Contingencies - Additional Information (Detail) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2008 USD ($) CreditFacility | Feb. 29, 2008 | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2008 facility
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of facilities | facility |  |  |  |  |  | 2
Rent expenses |  |  | $ 3,100,000 | $ 3,400,000 | $ 3,800,000 |
Lease agreement [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Fixed annual rate |  |  | 3.00% |  |  |
Security deposit | $ 293,200 |  |  |  |  |
Lease rent abated | $ 38,480 |  |  |  |  |
Letter of credit issued for security deposit | CreditFacility | 2 |  |  |  |  |
Tenant improvement allowance |  |  | $ 1,100,000 |  |  |
Lease agreement [Member] | First year [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Rent payable for leases | $ 73,500 |  |  |  |  |
Lease agreement [Member] | Final year [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Rent payable for leases |  |  | $ 93,000 |  |  |
Sublease [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Fixed annual rate |  |  | 2.50% |  |  |
Security deposit |  |  | $ 93,500 |  |  |
Sublease [Member] | First year [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Rent payable final year of Sublease |  |  | 80,500 |  |  |
Sublease [Member] | Final year [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Rent payable final year of Sublease |  |  | $ 93,500 |  |  |
Minimum [Member] | Lease agreement [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Rent abatement period | 2 months |  |  |  |  |
Minimum [Member] | Sublease [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Rent abatement period |  | 1 month |  |  |  |
Maximum [Member] | Lease agreement [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Rent abatement period | 8 months |  |  |  |  |
Maximum [Member] | Sublease [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Rent abatement period |  | 7 months |  |  |  |

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