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Note 11 - Intangible Assets (Details Textual) - USD ($)
12 Months Ended
Jan. 31, 2023
Jan. 31, 2022
Finite-Lived Intangible Assets, Gross, Total $ 18,831,000 $ 18,819,000
Amortization of Intangible Assets 1.1 $ 1,300,000
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