Note 15 - Segment Reporting - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jul. 31, 2023		Jul. 31, 2022	Jul. 31, 2023		Jul. 31, 2022	Jan. 31, 2023
Total assets	$ 34,225	[1]		$ 34,225	[1]		$ 32,858
Revenue from Contract with Customer	8,750	[2]	$ 8,713	21,336	[2]	$ 17,800
Total cost of sales	5,483	[2]	5,175	12,652	[2]	10,973
Depreciation and amortization	459	[2]	467	940	[2]	946
Interest Expense	(164)			(368)		(4)
Operating income (loss)	(1,548)	[2]	(1,551)	(1,259)	[2]	(4,027)
Operating Segments [Member] | Seamap Marine Products [Member]
Total assets	23,139			23,139			21,302
Revenue from Contract with Customer	7,618		5,025	18,215		13,104
Total cost of sales	4,677		3,213	10,738		8,270
Depreciation and amortization	284		309	597		632
Interest Expense	40			40		0
Operating income (loss)	1,026		292	3,746		1,723
Operating Segments [Member] | Klein Marine Products [Member]
Total assets	10,537			10,537			10,708
Revenue from Contract with Customer	1,238		3,689	3,569		4,810
Total cost of sales	912		1,963	2,362		2,817
Depreciation and amortization	157		135	306		267
Interest Expense				0		0
Operating income (loss)	(780)		494	(911)		(686)
Operating Segments [Member] | Equipment Leasing Discontinued [Member]
Total assets
Corporate, Non-Segment [Member]
Total assets	549			549			$ 848
Revenue from Contract with Customer				0		0
Total cost of sales				0		0
Depreciation and amortization	18		23	37		47
Interest Expense	(204)			(408)		(4)
Operating income (loss)	(1,794)		(2,337)	(4,094)		(5,064)
Intersegment Eliminations [Member]
Revenue from Contract with Customer	(106)		(1)	(448)		(114)
Total cost of sales	(106)		(1)	(448)		(114)
Depreciation and amortization				0		0
Interest Expense				0		0
Operating income (loss)				$ 0		$ 0

[1] Reflects the condensed consolidated balance sheet as of July 31, 2023 and condensed consolidated statement of operations for the three and six months ended July 31, 2023 in the Form 10-Q.

[2] Reflects the condensed consolidated balance sheet as of July 31, 2023 and condensed consolidated statement of operations for the three and six months ended July 31, 2023 and 2023 in the Form 10-Q.