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Income Taxes - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2014
Income Tax Disclosure [Abstract] |
Operating losses carry forward period | 20 years

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- Definition Operating Loss Carryforwards, Expiration Period + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Details
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Balance Type: | na
Period Type: | duration