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Note 1 - Business Information - Geographic Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2021 | Jan. 31, 2020
Net sales | $ 84,694 | $ 127,663
Property, plant and equipment, net of accumulated depreciation | 26,897 | 28,629
UNITED STATES |  |
Net sales | 42,527 | 56,702
Property, plant and equipment, net of accumulated depreciation | 7,672 | 9,063
CANADA |  |
Net sales | 12,367 | 22,203
Property, plant and equipment, net of accumulated depreciation | 10,592 | 11,554
Middle East [Member] |  |
Net sales | 23,662 | 26,505
Property, plant and equipment, net of accumulated depreciation | 7,854 | 7,815
Europe [Member] |  |
Net sales | 118 | 17,462
INDIA |  |
Net sales | 1,942 | 4,180
Property, plant and equipment, net of accumulated depreciation | 779 | 197
Other Geographical Area [Member] |  |
Net sales | $ 4,078 | $ 611

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