Note 8 - Intangible Assets (Details Textual) - USD ($)	3 Months Ended
Apr. 30, 2023	Apr. 30, 2022	Jan. 31, 2023
Finite-Lived Intangible Assets, Gross, Total	$ 18,840,000		$ 18,831,000
Amortization of Intangible Assets	276,000	$ 271,000
Klein Associates Incorporation [Member]
Impairment of Intangible Assets (Excluding Goodwill), Total	0
Technology Development Projects That Have Not Been Completed [Member]
Finite-Lived Intangible Assets, Gross, Total	$ 923,000

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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- Definition

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

+ References

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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