Income Taxes - Additional Information (Detail) - USD ($) |
3 Months Ended | 6 Months Ended | 7 Months Ended | 11 Months Ended | ||
|---|---|---|---|---|---|---|
Jul. 31, 2018 |
Jul. 31, 2017 |
Jul. 31, 2018 |
Jul. 31, 2017 |
Jul. 31, 2018 |
Dec. 31, 2017 |
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| Income Tax Disclosure [Abstract] | ||||||
| Income tax (benefits) provisions | $ (1,152,000) | $ 35,000 | $ (1,646,000) | $ 304,000 | ||
| Corporate federal income tax rate | 21.00% | 35.00% | ||||
| X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- 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/disclosureRef
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