Note 1 - Business Information - Geographic Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Net sales	$ 138,552	$ 84,694
Property, plant and equipment, net of accumulated depreciation	24,756	26,897
UNITED STATES
Net sales	46,770	42,527
Property, plant and equipment, net of accumulated depreciation	6,415	7,672
CANADA
Net sales	28,302	12,367
Property, plant and equipment, net of accumulated depreciation	9,750	10,592
Middle East/ North Africa [Member]
Net sales	51,543	23,662
Property, plant and equipment, net of accumulated depreciation	7,595	7,854
Europe [Member]
Net sales	194	118
INDIA
Net sales	11,101	1,942
Property, plant and equipment, net of accumulated depreciation	996	779
Other Geographical Area [Member]
Net sales	$ 642	$ 4,078