Note 8 - Stock-based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jul. 31, 2024	Jan. 31, 2024
Expired or forfeited, options (in shares)	0
Share-Based Payment Arrangement, Option [Member]
Outstanding, options (in shares)	22
Outstanding, weighted average exercise price (in dollars per share)	$ 11.15
Outstanding, weighted average remaining contractual term (Year)	1 year 4 months 24 days	8 months 12 days
Outstanding, aggregate intrinsic value	$ 10	$ 6
Exercised, options (in shares)	(1)
Exercised, weighted average exercise price (in dollars per share)	$ 6.85
Exercised, aggregate intrinsic value	$ 2
Expired or forfeited, options (in shares)	(17)
Expired or forfeited, weighted average exercise price (in dollars per share)	$ 12.41
Outstanding, options (in shares)	4	22
Outstanding, weighted average exercise price (in dollars per share)	$ 6.89	$ 11.15