Note 7 - Stock-based Compensation - Restricted Stock Activity (Details) - Restricted Stock [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 30, 2023	Jan. 31, 2023
Outstanding (in shares)	267
Outstanding, weighted average grant price (in dollars per share)	$ 8.55
Outstanding, aggregate intrinsic value	$ 2,288	$ 2,652
Granted (in shares)	1
Granted, weighted average grant price (in dollars per share)	$ 10.96
Forfeited or retired for taxes (in shares)	(1)
Forfeited or retired for taxes (in dollars per share)	$ 6.52
Outstanding (in shares)	267
Outstanding, weighted average grant price (in dollars per share)	$ 8.56