Income Taxes - Summary of Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2019	Apr. 30, 2018
Income Tax Disclosure [Abstract]
Loss before income taxes	$ (16,045)	$ (9,158)
Provision for income taxes	$ 1,266	$ 848
Effective tax rate	(7.90%)	(9.30%)

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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