Note 7 - Stock-based Compensation - Restricted Stock Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 30, 2022 USD ($) $ / shares shares
Forfeited or retired for taxes (in shares) | shares	(2)
Forfeited or retired for taxes (in dollars per share) | $ / shares	$ 6.76
Restricted Stock [Member]
Outstanding (in shares) | shares	354
Outstanding, weighted average grant price (in dollars per share) | $ / shares	$ 7.48
Outstanding, aggregate intrinsic value | $	$ 2,652
Outstanding (in shares) | shares	352
Outstanding, weighted average grant price (in dollars per share) | $ / shares	$ 7.34
Outstanding, aggregate intrinsic value | $	$ 2,584