Goodwill and Intangible Assets (Details)	12 Months Ended
Jan. 31, 2022 USD ($)	Jan. 31, 2022 USD ($) segment	Jan. 31, 2022 USD ($) operatingSegment	Jan. 31, 2022 USD ($) reporting_unit	Jan. 31, 2021 USD ($)	Jan. 31, 2020 USD ($)
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 4,572,000	$ 4,572,000	$ 4,572,000	$ 4,572,000	$ 4,842,000
Number of operating segments		1	1
Number of reporting units \| reporting_unit				1
Intangible assets, net	217,000	$ 217,000	$ 217,000	$ 217,000	767,000
Amortization of intangible assets	600,000				$ 600,000	$ 600,000
Indefinite-lived intangible assets	$ 0	$ 0	$ 0	$ 0

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 amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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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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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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