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Note 8 - Intangible Assets (Details Textual) - USD ($)
9 Months Ended
Oct. 31, 2022
Oct. 31, 2021
Jan. 31, 2022
Finite-Lived Intangible Assets, Gross, Total $ 18,819,000   $ 18,819,000
Impairment of Intangible Assets (Excluding Goodwill), Total 0    
Amortization of Intangible Assets 0.8 $ 1.0  
Technology Development Projects That Have Not Been Completed [Member]      
Finite-Lived Intangible Assets, Gross, Total $ 923,000