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Note 12 - Segment Reporting - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($)
3 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Operating income (loss) $ (658,000) $ 730,000
Other income (18,000) 469,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest (676,000) 1,199,000
Operating Segments [Member] | Seamap Marine Products [Member]    
Operating income (loss) 1,132,000 2,076,000
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]    
Operating income (loss) $ (1,790,000) $ (1,346,000)