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Note 5 - Trade Receivables - Trade Receivables (Details) - USD ($) $ in Thousands | Jan. 31, 2020 | Jan. 31, 2019
--- | --- | ---
Trade receivables | $ 37,121 | $ 33,350
Less: Allowance for doubtful accounts | (2,003) | (1,857)
| $ 35,118 | $ 31,493

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