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Fair Value of Financial Instruments - Additional Information (Detail) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 Private Placement Warrants [Member] Black-Scholes [Member] | Dec. 31, 2013 Private Placement Warrants [Member] Black-Scholes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Warrant sensitivity percentage |  |  |  |  |  | 10.00%
Estimated fair value |  |  |  |  | $ 1,700,000 |
Private placement warrant (income) expense | (99,000) | 4,207,000 | (332,000) | 9,053,000 |  |
Contingent liability description |  |  | A five percentage point decrease in the volatility factor would result in an increase in the fair value of the contingent consideration by approximately $50,000. |  |  |
Change in contingent liability |  |  | 50,000 |  |  |
Change in the fair value of contingent consideration | $ (900,000) |  |  |  |  |

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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e7008-128479 + Details
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