Note 12 - Segment Reporting - Schedule of Segment Reporting Information, By Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
Total revenue from contracts with customers	$ 7,902	$ 9,678
Cost of sales	4,571	5,460
Selling, general and administrative	3,384	2,759
Research and development	380	462
Depreciation and amortization expense	225	267
Operating income (loss)	(658)	730
Capital expenditures	237	66
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Total revenue from contracts with customers	0	0
Cost of sales	0	0
Selling, general and administrative	1,708	1,263
Research and development	78	79
Depreciation and amortization expense	4	4
Operating income (loss)	(1,790)	(1,346)
Capital expenditures	26	2
Seamap Marine Products [Member] | Operating Segments [Member]
Total revenue from contracts with customers	7,902	9,678
Cost of sales	4,571	5,460
Selling, general and administrative	1,676	1,496
Research and development	302	383
Depreciation and amortization expense	221	263
Operating income (loss)	1,132	2,076
Capital expenditures	$ 211	$ 64