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Note 1 - Business Information - Geographic Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2020 | Jan. 31, 2019
Sales by product | $ 127,663 | $ 128,965
Property, plant and equipment, net of accumulated depreciation | 28,629 | 30,398
UNITED STATES |  |
Sales by product | 56,702 | 50,319
Property, plant and equipment, net of accumulated depreciation | 9,063 | 10,279
CANADA |  |
Sales by product | 22,203 | 34,789
Property, plant and equipment, net of accumulated depreciation | 11,554 | 11,862
Middle East [Member] |  |
Sales by product | 26,505 | 35,117
Property, plant and equipment, net of accumulated depreciation | 7,815 | 8,103
Europe [Member] |  |
Sales by product | 17,462 | 1,029
INDIA |  |
Sales by product | 4,180 | 3,755
Property, plant and equipment, net of accumulated depreciation | 197 | 154
Other Geographical Area [Member] |  |
Sales by product | $ 611 | $ 3,956

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