Note 12 - Segment Reporting - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Operating (loss) income	$ 774,000	$ 1,876,000	$ 2,780,000	$ 4,036,000
Other income	4,000	(189,000)	(79,000)	320,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	778,000	1,687,000	2,701,000	4,356,000
Operating Segments [Member] | Seamap Marine Products [Member]
Operating (loss) income	2,420,000	3,059,000	8,333,000	7,815,000
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Operating (loss) income	$ (1,646,000)	$ (1,183,000)	$ (5,553,000)	$ (3,779,000)