Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2019	Apr. 30, 2018
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 55	$ 437
Pre-tax net loss	$ 2,360	$ 5,468

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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