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Note 7 - Intangible Assets

6 Months Ended

Jul. 31, 2025

Goodwill and Intangible Assets Disclosure [Text Block]

7. Intangible Assets

			*July 31, 2025*							*January 31, 2025*
	*Weighted*
	*Average Life at*		*Gross Carrying*		*Accumulated*			*Net Carrying*		*Gross Carrying*		*Accumulated*			*Net Carrying*
	*July 31, 2025*		*Amount*		*Amortization*			*Amount*		*Amount*		*Amortization*			*Amount*
			(in thousands)							(in thousands)
Proprietary rights		3.4		7,472		(5,708	)		1,764		7,472		(5,501	)		1,971
Customer relationships		—		4,884		(4,884	)		—		4,884		(4,884	)		—
Patents		0.8		2,540		(2,315	)		225		2,540		(2,269	)		271
Trade name		0.8		134		(121	)		13		134		(121	)		13
Other		0.1		483		(468	)		15		481		(428	)		53
Intangible assets			$	15,513	$	(13,496	)	$	2,017	$	15,511	$	(13,203	)	$	2,308

On January 31, 2025, the Company completed an annual review of amortizable intangible assets. Based on a review of qualitative factors, it was determined that there were no events or changes in circumstances indicating that the carrying value of amortizable intangible assets was not recoverable. During the six months ended July 31, 2025, there have been no substantive indicators of impairment.

Aggregate amortization expense was approximately $145,000 and $294,000 for the three and six months ended July 31, 2025, respectively, and approximately $159,000 and $345,000 for the three and six months ended July 31, 2024, respectively. As of July 31, 2025, future estimated amortization expense related to amortizable intangible assets was estimated to be:

For fiscal years ending January 31,		(in thousands)
2026	$	272
2027		384
2028		315
2029		213
2030		213
Thereafter		620
Total	$	2,017