Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Revenues:
Sales of marine technology products	$ 13,561,000	$ 10,036,000	$ 21,463,000	$ 19,714,000
Cost of sales:
Total cost of sales	6,732,000	5,258,000	11,303,000	10,718,000
Gross profit	6,829,000	4,778,000	10,160,000	8,996,000
Operating expenses:
Selling, general and administrative	3,637,000	2,784,000	7,021,000	5,543,000
Research and development	311,000	328,000	691,000	790,000
Depreciation and amortization	217,000	236,000	442,000	503,000
Total operating expenses	4,165,000	3,348,000	8,154,000	6,836,000
Operating income	2,664,000	1,430,000	2,006,000	2,160,000
Other income (expense):
Other, net	(65,000)	40,000	(83,000)	509,000
Total other income (expense)	(65,000)	40,000	(83,000)	509,000
Income before income taxes	2,599,000	1,470,000	1,923,000	2,669,000
Provision for income taxes	(670,000)	(672,000)	(964,000)	(917,000)
Net income	1,929,000	798,000	959,000	1,752,000
Preferred stock dividends - undeclared	0	(947,000)	0	(1,894,000)
Net income (loss) attributable to common stockholders	$ 1,929,000	$ (149,000)	$ 959,000	$ (142,000)
Net income (loss) per common share - Basic and diluted (in dollars per share)	$ 0.24	$ (0.11)	$ 0.12	$ (0.1)
Shares used in computing net income (loss) per common share:
Basic and diluted (in shares)	7,969	1,406	7,969	1,406
Marine Technology Products [Member]
Cost of sales:
Total cost of sales	$ 6,732,000	$ 5,258,000	$ 11,303,000	$ 10,718,000