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Note 1 - Summary of Business and Significant Accounting Policies - Future Amortization of Intangible Assets (Details) - USD ($)
$ in Thousands
Jan. 31, 2020
Jan. 31, 2019
2021 $ 276  
2022 276  
2023 276  
2024 157  
Thereafter  
Net amortizable intangible assets $ 985 $ 1,233