Note 9 - Intangible Assets (Tables)

6 Months Ended

Jul. 31, 2023

Notes Tables

Schedule of Intangible Assets and Goodwill [Table Text Block]

		July 31, 2023										January 31, 2023
	Weighted
	Average Life at	Gross Carrying		Accumulated						Net Carrying		Gross Carrying		Accumulated						Net Carrying
	July 31, 2023	Amount		Amortization			Impairment			Amount		Amount		Amortization			Impairment			Amount
		(in thousands)										(in thousands)
Proprietary rights	4.7		8,238		(4,835	)		—			3,403		8,238		(4,606	)		—			3,632
Customer relationships	0.1		5,024		(4,943	)		—			81		5,024		(4,894	)		—			130
Patents	1.6		2,540		(2,123	)		—			417		2,540		(2,027	)		—			513
Trade name	2.8		894		(102	)		(760	)		32		894		(97	)		(760	)		37
Developed technology	2.4		1,430		(1,084	)		—			346		1,430		(1,013	)		—			417
Other	0.9		714		(575	)		—			139		705		(503	)		—			202
Intangible assets		$	18,840	$	(13,662	)	$	(760	)	$	4,418	$	18,831	$	(13,140	)	$	(760	)	$	4,931

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

For fiscal years ending January 31,		(in thousands)
2024	$	468
2025		743
2026		617
2027		330
2028		283
Thereafter		1,054
Total	$	3,495