Note 8 - Intangible Assets (Tables)

9 Months Ended

Oct. 31, 2022

Notes Tables

Schedule of Intangible Assets and Goodwill [Table Text Block]

		October 31, 2022										January 31, 2022
	Weighted	Gross								Net		Gross								Net
	Average Life at	Carrying		Accumulated						Carrying		Carrying		Accumulated						Carrying
	October 31, 2022	Amount		Amortization			Impairment			Amount		Amount		Amortization			Impairment			Amount
		(in thousands)										(in thousands)
Proprietary rights	5.3		8,237		(4,492	)		—			3,745		8,237		(4,150	)		—			4,087
Customer relationships	0.2		5,024		(4,870	)		—			154		5,024		(4,797	)		—			227
Patents	2.2		2,540		(1,965	)		—			575		2,540		(1,778	)		—			762
Trade name	3.6		894		(94	)		(760	)		40		894		(85	)		(760	)		49
Developed technology	3.2		1,430		(977	)		—			453		1,430		(870	)		—			560
Other	1.5		694		(468	)		—			226		694		(361	)		—			333
Intangible assets		$	18,819	$	(12,866	)	$	(760	)	$	5,193	$	18,819	$	(12,041	)	$	(760	)	$	6,018

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

For fiscal years ending January 31,		(in thousands)
2023	$	274
2024		955
2025		725
2026		634
2027		333
Thereafter		1,349
Total	$	4,270