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Subsequent Event - Additional Information (Detail) (USD $)
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0 Months Ended | |||
|---|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Mar. 07, 2014
Subsequent Event [Member]
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| Subsequent Event [Line Items] | ||||
| Cash purchase price | $ 7,500,000 | |||
| Contingent retention based bonuses | $ 161,000 | $ 212,000 | $ 4,000,000 | |
| Period of acquisition | 2 years |