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 |