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Note 2 - Significant Accounting Policies (Details Textual)
Pure in Thousands, $ in Thousands
 12 Months Ended
Jan. 31, 2025
USD ($)
Jan. 31, 2024
USD ($)
Realized Gain (Loss), Foreign Currency Transaction, before Tax $ (300) $ (100)
Cash and Cash Equivalent 15,716 5,845
Restricted Cash and Cash Equivalent 1,401 1,395
Depreciation 3,600 3,800
Impairment, Long-Lived Asset, Held-for-Use 0  
Finite-Lived Patents, Gross 2,700 2,700
Finite-Lived Intangible Assets, Accumulated Amortization 2,600 2,600
Finite-Lived Intangible Asset, Expected Amortization, Year One $ 100  
Finite-Lived Intangible Asset, Useful Life (Year) 9 years 1 month 6 days  
Research and Development Expense $ 100 $ 500
Finite-Lived Intangible Asset, Expected Amortization, Year Two 100  
Finite-Lived Intangible Asset, Expected Amortization, Year Three 100  
Finite-Lived Intangible Asset, Expected Amortization, Year Four 100  
Finite-Lived Intangible Asset, Expected Amortization, Year Five $ 100  
Minimum [Member] | Restricted Stock [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 1 year  
Maximum [Member] | Restricted Stock [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 4 years  
Accounts Receivable [Member] | Customer Concentration Risk [Member]    
Number of Major Customers 0 0
Revenue Benchmark [Member] | Customer Concentration Risk [Member]    
Number of Major Customers 0 0
Geographic Distribution, Domestic [Member]    
Cash and Cash Equivalent $ 300 $ 100
Restricted Cash and Cash Equivalent 0 0
Geographic Distribution, Foreign [Member]    
Cash and Cash Equivalent 15,400 5,700
Restricted Cash and Cash Equivalent $ 1,400 $ 1,400