Note 11 - Intangible Assets (Tables)

12 Months Ended

Jan. 31, 2023

Notes Tables

Schedule of Intangible Assets and Goodwill [Table Text Block]

			January 31, 2023										January 31, 2022
	Weighted
	Average		Gross								Net		Gross								Net
	Life at		Carrying		Accumulated						Carrying		Carrying		Accumulated						Carrying
	1/31/2023		Amount		Amortization			Impairment			Amount		Amount		Amortization			Impairment			Amount
			(in thousands)										(in thousands)
Proprietary rights		5.1	$	8,238	$	(4,606	)		—			3,632	$	8,237	$	(4,150	)		—			4,087
Customer relationships		0.2		5,024		(4,894	)		—			130		5,024		(4,797	)		—			227
Patents		2.0		2,540		(2,027	)		—			513		2,540		(1,778	)		—			762
Trade name		3.3		894		(97	)		(760	)		37		894		(85	)		(760	)		49
Developed technology		2.9		1,430		(1,013	)		—			417		1,430		(870	)		—			560
Other		1.3		705		(503	)		—			202		694		(361	)		—			333
Amortizable intangible assets			$	18,831	$	(13,140	)	$	(760	)	$	4,931	$	18,819	$	(12,041	)	$	(760	)	$	6,018

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

For fiscal year ending January 31:
2024	$	704
2025		839
2026		608
2027		506
2028		267
Thereafter		1,084
Total	$	4,008