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Note 11 - Intangible Assets

12 Months Ended

Jan. 31, 2023

Goodwill and Intangible Assets Disclosure [Text Block]

11. Intangible Assets

Intangible assets from continuing operations consisted of the following:

			*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

Approximately $923,000 of the gross carrying amount of intangible assets, primarily in proprietary rights, are related to technology development projects that have not yet been completed. As a result, these intangible assets are not currently being amortized. The Company did not record impairment of intangible assets during fiscal years 2023 and 2022.

Aggregate amortization expense was $1.1 million and $1.3 million for fiscal 2023 and fiscal 2022, respectively. As of January 31, 2023, future estimated amortization expense related to amortizable intangible assets is estimated to be (in thousands):

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