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Commitments and Contingencies - Additional Information (Detail) (USD $) | 1 Months Ended |
--- | --- | ---
Nov. 30, 2012 | Feb. 28, 2013
Commitments and Contingencies Disclosure [Line Items] |  |
Insurance coverage subject to deductible limit |  | $ 250,000
Penalty for misdemeanor violation term | 5 years |
Penalty for this misdemeanor violation amount | $ 200,000 |

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