Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2020	Apr. 30, 2019
Income Tax Disclosure [Abstract]
Tax expense (benefit)	$ (402)	$ (1,157)
Pretax losses	$ 58,064	$ 53,123
Effective income tax rate	0.70%	2.20%

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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