Goodwil, Long-lived Assets, and Other Charges - Long-lived Asset Impairment (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Impaired Long-Lived Assets Held and Used [Line Items]
Long-lived asset impairment loss	$ 0	$ 0	$ 259
Operating Income (Loss)
Impaired Long-Lived Assets Held and Used [Line Items]
Long-lived asset impairment loss	$ 0	$ 0

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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