Note 19 - Segment Reporting - Reconciliation of Operating Income Loss to Loss From Continuing Operations Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Operating income (loss)	$ (7,614)	$ (14,544)
Employment Retention Credit	1,004	0
Paycheck Protection Plan	0	850
Other	(122)	76
Loss from continuing operations before income taxes	(6,732)	(13,618)
Corporate, Non-Segment [Member]
Operating income (loss)	(7,379)	(4,819)
Seamap Marine Products [Member] | Operating Segments [Member]
Operating income (loss)	2,074	(4,462)
Klein Marine Products [Member] | Operating Segments [Member]
Operating income (loss)	$ (2,309)	$ (5,263)