Income Taxes - Additional Information (Detail) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
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| Income Tax Disclosure [Abstract] | ||||
| Liability for unrecognized tax benefit, including related estimates of penalties and interest | $ 0 | $ 0 | $ 0 | $ 0 |
| Income tax provision (benefit) | $ 35,000 | $ 40,000 | $ 111,000 | $ 117,000 |
| Projected annual effective tax rate | 0.80% | 1.30% | 0.90% | 1.10% |
| Statutory tax rate | 34.00% | 34.00% | 34.00% | 34.00% |
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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