Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023
Revenues:
Sale of marine technology products	$ 36,510	$ 25,012
Cost of sales:
Gross profit	15,971	9,950
Operating expenses:
Selling, general and administrative	12,142	12,883
Research and development	2,133	1,373
Depreciation and amortization	1,178	1,344
Total operating expenses	15,453	15,600
Operating income (loss)	518	(5,650)
Other (expense) income	(280)	256
Income (loss) from continuing operations before income taxes	238	(5,394)
Provision for income taxes	(1,338)	(699)
Loss from continuing operations	(1,100)	(6,093)
Income (loss) from discontinued operations, net of income taxes	1,374	(2,739)
Net income (loss)	274	(8,832)
Preferred stock dividends - declared	(946)	(947)
Preferred stock dividends - undeclared	(2,842)	(2,841)
Net loss attributable to common stockholders	$ (3,514)	$ (12,620)
Net (loss) income per common share - Basic and diluted
Continuing operations (in dollars per share)	$ (3.48)	$ (7.03)
Discontinued operations (in dollars per share)	0.98	(1.95)
Net loss (in dollars per share)	$ (2.5)	$ (8.98)
Basic (in shares)	1,406	1,405
Diluted (in shares)	1,406	1,405
Marine Technology Products [Member]
Cost of sales:
Total cost of sales	$ 20,539	$ 15,062