Note 19 - Segment Reporting - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands		12 Months Ended
		Jan. 31, 2023	Jan. 31, 2022
Accounts Receivable, Net		$ 3,993	$ 8,126
Inventories, Net		15,318	14,006
Long-lived Assets, Net		10,625	12,125
Segment assets		29,936	34,257
Other(1)	[1]	2,922	7,763
Total Consolidated Assets		32,858	42,020
Total revenues		35,091	23,107
Total cost of sales		22,116	17,085
Capital expenditures		631	990
Depreciation and amortization		1,887	2,209
Operating income (loss)		(7,614)	(14,544)
Operating Segments [Member] | Seamap Marine Products [Member]
Accounts Receivable, Net		3,245	7,246
Inventories, Net		11,026	9,508
Long-lived Assets, Net		5,649	7,741
Segment assets		19,920	24,495
Total revenues		25,012	17,294
Total cost of sales		15,537	11,735
Capital expenditures		103	233
Depreciation and amortization		1,253	1,591
Operating income (loss)		2,074	(4,462)
Operating Segments [Member] | Klein Marine Products [Member]
Accounts Receivable, Net		748	880
Inventories, Net		4,292	4,498
Long-lived Assets, Net		4,480	3,879
Segment assets		9,520	9,257
Total revenues		10,555	5,825
Total cost of sales		7,055	5,362
Capital expenditures		528	757
Depreciation and amortization		543	541
Operating income (loss)		(2,309)	(5,263)
Corporate, Non-Segment [Member]
Accounts Receivable, Net		0	0
Inventories, Net		0	0
Long-lived Assets, Net		496	505
Segment assets		496	505
Total revenues		0	0
Total cost of sales		0	0
Capital expenditures		0	0
Depreciation and amortization		91	77
Operating income (loss)		(7,379)	(4,819)
Intersegment Eliminations [Member]
Total revenues		(476)	(12)
Total cost of sales		(476)	(12)
Capital expenditures		0	0
Depreciation and amortization		0	0
Operating income (loss)		$ 0	$ 0

[1] Other includes cash and prepaid expenses and other assets.