Note 12 - Segment Reporting - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Operating (loss) income	$ 2,664	$ 1,430	$ 2,006	$ 2,160
Other income	(65)	40	(83)	509
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	2,599	1,470	1,923	2,669
Operating Segments [Member] | Seamap Marine Products [Member]
Operating (loss) income	4,781	2,679	5,913	4,757
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Operating (loss) income	$ (2,117)	$ (1,249)	$ (3,907)	$ (2,597)