The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Goodwill and Intangible Assets (Details) $ in Thousands	12 Months Ended
Goodwill and Intangible Assets (Details) $ in Thousands	Jan. 31, 2020 USD ($) segment	Jan. 31, 2019 USD ($)	Jan. 31, 2017 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of operating segments \| segment	1
Goodwill	$ 4,534	$ 4,660
Amortization of intangible assets	$ 600	$ 600	$ 700
Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life	5 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life	15 years