Note 8 - Intangible Assets (Tables)

3 Months Ended

Apr. 30, 2023

Notes Tables

Schedule of Intangible Assets and Goodwill [Table Text Block]

		April 30, 2023										January 31, 2023
	Weighted	Gross								Net		Gross								Net
	Average Life at	Carrying		Accumulated						Carrying		Carrying		Accumulated						Carrying
	April 30, 2023	Amount		Amortization			Impairment			Amount		Amount		Amortization			Impairment			Amount
		(in thousands)										(in thousands)
Proprietary rights	4.9		8,238		(4,722	)		—			3,516		8,238		(4,606	)		—			3,632
Customer relationships	0.1		5,024		(4,919	)		—			105		5,024		(4,894	)		—			130
Patents	1.8		2,540		(2,090	)		—			450		2,540		(2,027	)		—			513
Trade name	3.1		894		(99	)		(760	)		35		894		(97	)		(760	)		37
Developed technology	2.7		1,430		(1,049	)		—			381		1,430		(1,013	)		—			417
Other	1.1		714		(537	)		—			177		705		(503	)		—			202
Intangible assets		$	18,840	$	(13,416	)	$	(760	)	$	4,664	$	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	$	757
2025		728
2026		628
2027		349
2028		283
Thereafter		996
Total	$	3,741