Note 9 - Intangible Assets (Tables)

12 Months Ended

Jan. 31, 2024

Notes Tables

Schedule of Intangible Assets and Goodwill [Table Text Block]

			January 31, 2024							January 31, 2023
	Weighted
	Average		Gross					Net		Gross					Net
	Life at		Carrying		Accumulated			Carrying		Carrying		Accumulated			Carrying
	1/31/2024		Amount		Amortization			Amount		Amount		Amortization			Amount
			(in thousands)							(in thousands)
Proprietary rights		4.8	$	7,473	$	(5,053	)		2,420	$	7,473	$	(4,612	)		2,861
Customer relationships		0.1		4,884		(4,852	)		32		4,884		(4,754	)		130
Patents		1.3		2,540		(2,190	)		350		2,540		(2,027	)		513
Trade name		2.3		134		(108	)		26		134		(97	)		37
Other		0.3		426		(366	)		60		375		(283	)		92
Amortizable intangible assets			$	15,457	$	(12,569	)	$	2,888	$	15,406	$	(11,773	)	$	3,633

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

For fiscal year ending January 31:
2025	$	614
2026		520
2027		381
2028		315
2029		213
Thereafter		845
Total	$	2,888