Note 7 - Intangible Assets (Tables)

3 Months Ended

Apr. 30, 2026

Notes Tables

Intangible Asset and Goodwill [Table Text Block]

						*April 30, 2026*												*January 31, 2026*
		*Weighted*
		*Average Life at*				*Gross Carrying*				*Accumulated*				*Net Carrying*				*Gross Carrying*				*Accumulated*				*Net Carrying*
		*April 30, 2026*				*Amount*				*Amortization*				*Amount*				*Amount*				*Amortization*				*Amount*
						(in thousands)												(in thousands)
Proprietary rights			2.9				7,472				(6,016	)			1,456				7,472				(5,911	)			1,561
Customer relationships			—				4,884				(4,884	)			—				4,884				(4,884	)			—
Patents			0.6				2,540				(2,383	)			157				2,540				(2,362	)			178
Trade name			0.1				134				(133	)			1				134				(130	)			4
Other			—				495				(495	)			—				498				(488	)			10
Intangible assets						$	15,525			$	(13,911	)		$	1,614			$	15,528			$	(13,775	)		$	1,753

Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense [Table Text Block]

For fiscal years ending January 31,			(in thousands)
2027		$	253
2028			315
2029			213
2030			213
2031			213
Thereafter			407
Total		$	1,614