Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands	3 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
Revenues:
Sales of marine technology products	$ 7,902,000	$ 9,678,000
Cost of sales:
Total cost of sales	4,571,000	5,460,000
Gross profit	3,331,000	4,218,000
Operating expenses:
Selling, general and administrative	3,384,000	2,759,000
Research and development	380,000	462,000
Depreciation and amortization	225,000	267,000
Total operating expenses	3,989,000	3,488,000
Operating income (loss)	(658,000)	730,000
Other income (expense):
Other, net	(18,000)	469,000
Total other income (expense)	(18,000)	469,000
Income (loss) before income taxes	(676,000)	1,199,000
Provision for income taxes	(294,000)	(245,000)
Net income (loss)	(970,000)	954,000
Preferred stock dividends - undeclared	0	(947,000)
Net income (loss) attributable to common stockholders	$ (970,000)	$ 7,000
Net loss per common share - Basic and diluted (in dollars per share)	$ (0.12)	$ 0
Shares used in computing net income (loss) per common share:
Basic and diluted (in shares)	7,969	1,406
Marine Technology Products [Member]
Cost of sales:
Total cost of sales	$ 4,571,000	$ 5,460,000