Note 7 - Intangible Assets (Tables)

3 Months Ended

Apr. 30, 2025

Notes Tables

Schedule of Intangible Assets and Goodwill [Table Text Block]

			April 30, 2025							January 31, 2025
	Weighted
	Average Life at		Gross Carrying		Accumulated			Net Carrying		Gross Carrying		Accumulated			Net Carrying
	April 30, 2025		Amount		Amortization			Amount		Amount		Amortization			Amount
			(in thousands)							(in thousands)
Proprietary rights		3.6		7,472		(5,606	)		1,866		7,472		(5,501	)		1,971
Customer relationships		—		4,884		(4,884	)		—		4,884		(4,884	)		—
Patents		0.9		2,540		(2,292	)		248		2,540		(2,269	)		271
Trade name		1.1		134		(121	)		13		134		(121	)		13
Other		0.1		483		(448	)		35		481		(428	)		53
Intangible assets			$	15,513	$	(13,351	)	$	2,162	$	15,511	$	(13,203	)	$	2,308

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

For fiscal years ending January 31,		(in thousands)
2026	$	419
2027		382
2028		315
2029		213
2030		213
Thereafter		620
Total	$	2,162