Note 12 - Segment Reporting - Schedule of Segment Reporting Information, By Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Total revenue from contracts with customers	$ 13,561	$ 10,036	$ 21,463	$ 19,714
Cost of sales	6,732	5,258	11,303	10,718
Selling, general and administrative	3,637	2,784	7,021	5,543
Research and development	311	328	691	790
Depreciation and amortization expense	217	236	442	503
Operating (loss) income	2,664	1,430	2,006	2,160
Capital expenditures	182	80	419	146
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	2,008	1,185	3,715	2,448
Research and development	105	60	183	140
Depreciation and amortization expense	4	4	9	9
Operating (loss) income	(2,117)	(1,249)	(3,907)	(2,597)
Capital expenditures	1	0	27	2
Seamap Marine Products [Member] | Operating Segments [Member]
Total revenue from contracts with customers	13,561	10,036	21,463	19,714
Cost of sales	6,732	5,258	11,303	10,718
Selling, general and administrative	1,629	1,599	3,306	3,095
Research and development	206	268	508	650
Depreciation and amortization expense	213	232	433	494
Operating (loss) income	4,781	2,679	5,913	4,757
Capital expenditures	$ 181	$ 80	$ 392	$ 144