Note 14 - Segment Reporting - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		21843 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2022	Jan. 31, 2023
22,516	$ 33,845			$ 32,858
Total revenues	12,586	$ 9,087
Total cost of sales	7,169	5,798
Depreciation and amortization	481	479
Interest Expense	(204)	(4)	$ (4)
Operating loss	289	(2,476)	(2,476)
Operating Segments [Member] | Seamap Marine Products [Member]
22,516	22,516			21,302
Total revenues	10,597	8,079
Total cost of sales	6,061	5,057
Depreciation and amortization	313	323
Interest Expense	0	0
Operating loss	2,720	1,431	1,431
Operating Segments [Member] | Klein Marine Products [Member]
22,516	10,680			10,708
Total revenues	2,330	1,122
Total cost of sales	1,449	855
Depreciation and amortization	149	132
Interest Expense	0	0
Operating loss	(131)	(1,180)	(1,180)
Operating Segments [Member] | Equipment Leasing Discontinued [Member]
22,516	0			0
Corporate, Non-Segment [Member]
22,516	649			$ 848
Total revenues	0	0
Total cost of sales	0	0
Depreciation and amortization	19	24
Interest Expense	(204)	(4)
Operating loss	(2,300)	(2,727)	$ (2,727)
Intersegment Eliminations [Member]
Total revenues	(341)	(114)
Total cost of sales	(341)	(114)
Depreciation and amortization	0	0
Interest Expense	0	0
Operating loss	$ 0	$ 0