Note 7 - Intangible Assets

3 Months Ended

Apr. 30, 2025

Notes to Financial Statements

Goodwill and Intangible Assets Disclosure [Text Block]

7. Intangible Assets

			April 30, 2025							January 31, 2025
	Weighted
	Average Life at		Gross Carrying		Accumulated			Net Carrying		Gross Carrying		Accumulated			Net Carrying
	April 30, 2025		Amount		Amortization			Amount		Amount		Amortization			Amount
			(in thousands)							(in thousands)
Proprietary rights		3.6		7,472		(5,606	)		1,866		7,472		(5,501	)		1,971
Customer relationships		—		4,884		(4,884	)		—		4,884		(4,884	)		—
Patents		0.9		2,540		(2,292	)		248		2,540		(2,269	)		271
Trade name		1.1		134		(121	)		13		134		(121	)		13
Other		0.1		483		(448	)		35		481		(428	)		53
Intangible assets			$	15,513	$	(13,351	)	$	2,162	$	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 three months ended April 30, 2025, there have been no substantive indicators of impairment.

Aggregate amortization expense was approximately $148,000 and $185,000 for the three months ended April 30, 2025, and  April 30, 2024, respectively. As of April 30, 2025, future estimated amortization expense related to amortizable intangible assets was estimated to be:

For fiscal years ending January 31,		(in thousands)
2026	$	419
2027		382
2028		315
2029		213
2030		213
Thereafter		620
Total	$	2,162