Note 9 - Intangible Assets (Tables)

12 Months Ended

Jan. 31, 2025

Notes Tables

Schedule of Intangible Assets and Goodwill [Table Text Block]

			January 31, 2025							January 31, 2024
	Weighted
	Average		Gross					Net		Gross					Net
	Life at		Carrying		Accumulated			Carrying		Carrying		Accumulated			Carrying
	1/31/2025		Amount		Amortization			Amount		Amount		Amortization			Amount
			(in thousands)							(in thousands)
Proprietary rights		3.9	$	7,472	$	(5,501	)		1,971	$	7,473	$	(5,053	)		2,420
Customer relationships		—		4,884		(4,884	)		—		4,884		(4,852	)		32
Patents		0.9		2,540		(2,269	)		271		2,540		(2,190	)		350
Trade name		1.3		134		(121	)		13		134		(108	)		26
Other		0.1		481		(428	)		53		426		(366	)		60
Amortizable intangible assets			$	15,511	$	(13,203	)	$	2,308	$	15,457	$	(12,569	)	$	2,888

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

For fiscal year ending January 31:
2026	$	565
2027		379
2028		315
2029		213
2030		213
Thereafter		623
Total	$	2,308