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Income Taxes - Additional Information (Detail) | 6 Months Ended
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Jun. 30, 2017 USD ($)
Income Tax Examination [Line Items] |
Gross liability for tax positions | $ 115,000
Tax positions that will be resolved within the next twelve months | $ 54,000
Income tax examination years description | The Company is no longer subject to U.S. Federal income tax examinations for the years prior to 2014.
State Jurisdiction | Minimum |
Income Tax Examination [Line Items] |
Income tax examination year | 2013
State Jurisdiction | Maximum |
Income Tax Examination [Line Items] |
Income tax examination year | 2016

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