Note 12 - Segment Reporting - Schedule of Segment Reporting Information, By Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Total revenue from contracts with customers	$ 9,688	$ 12,105	$ 31,151	$ 31,819
Cost of sales	5,175	6,684	16,478	17,402
Selling, general and administrative	3,021	2,762	10,042	8,305
Research and development	506	562	1,197	1,352
Depreciation and amortization expense	212	221	654	724
Operating (loss) income	774	1,876	2,780	4,036
Capital expenditures	93	67	512	213
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Total revenue from contracts with customers	0	0	0	0
Cost of sales	0	0	0	0
Selling, general and administrative	1,567	1,085	5,282	3,533
Research and development	79	94	262	233
Depreciation and amortization expense	0	4	9	13
Operating (loss) income	(1,646)	(1,183)	(5,553)	(3,779)
Capital expenditures	1	3	29	5
Seamap Marine Products [Member] | Operating Segments [Member]
Total revenue from contracts with customers	9,688	12,105	31,151	31,819
Cost of sales	5,175	6,684	16,478	17,402
Selling, general and administrative	1,454	1,677	4,760	4,772
Research and development	427	468	935	1,119
Depreciation and amortization expense	212	217	645	711
Operating (loss) income	2,420	3,059	8,333	7,815
Capital expenditures	$ 92	$ 64	$ 483	$ 208