Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2019	Apr. 30, 2018
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes	$ (138)	$ 467
Unrecognized tax benefits	4,600
Unrecognized tax benefits that would impact effective tax rate	100
Decrease in unrecognized tax benefits is reasonably possible	$ 0

Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of unrecognized tax benefits.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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