Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Revenues:
Sales of marine technology products, revenues	$ 9,678,000	$ 10,597,000
Cost of sales:
Gross profit	4,218,000	4,536,000
Operating expenses:
Selling, general and administrative	2,759,000	3,306,000
Research and development	462,000	478,000
Depreciation and amortization	267,000	333,000
Total operating expenses	3,488,000	4,117,000
Operating income	730,000	419,000
Other income (expense):
Interest expense	0	(204,000)
Other, net	469,000	72,000
Total other income (expense)	469,000	(132,000)
Income from continuing operations before income taxes	1,199,000	287,000
Provision for income taxes	(245,000)	(411,000)
Net income (loss) from continuing operations	954,000	(124,000)
Loss from discontinued operations, net of income taxes	0	(116,000)
Net income (loss)	954,000	(240,000)
Preferred stock dividends - declared	0	0
Preferred stock dividends - undeclared	(947,000)	(947,000)
Net income (loss) attributable to common stockholders	$ 7,000	$ (1,187,000)
Net income (loss) per common share - Basic and Diluted
Continuing operations (in dollars per share)	$ 0	$ (0.76)
Discontinued operations (in dollars per share)	0	(0.08)
Net income (loss) (in dollars per share)	$ 0	$ (0.84)
Shares used in computing net income (loss) per common share:
Basic and diluted (in shares)	1,406	1,406
Marine Technology Products [Member]
Cost of sales:
Sales of marine technology products, costs	$ 5,460,000	$ 6,061,000