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Note 9 - Property and Equipment - Location of Property and Equipment (Details) - USD ($) $ in Thousands | Jan. 31, 2022 | Jan. 31, 2021
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Net book value of property and equipment | $ 4,272 | $ 4,751
UNITED STATES |  |
Net book value of property and equipment | 3,068 | 3,133
Europe [Member] |  |
Net book value of property and equipment | 46 | 87
SINGAPORE |  |
Net book value of property and equipment | 332 | 480
MALAYSIA |  |
Net book value of property and equipment | $ 826 | $ 1,051

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