Note 9 - Stock-based Compensation - Stock Option Activity (Details) - Share-based Payment Arrangement, Option [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Outstanding beginning of period (in shares)	132	218
Outstanding at beginning of period, weighted average exercise price (in dollars per share)	$ 8.98	$ 8.60
Outstanding weighted average remaining contractual term (Year)	2 years 182 days	3 years 73 days	3 years 292 days
Outstanding at beginning of period, aggregate intrinsic value	$ 5	$ 160	$ 257
Exercised (in shares)		(53)
Exercised, weighted average exercise price (in dollars per share)		$ 6.91
Exercised, aggregate intrinsic value		$ 162
Canceled options during the year (in shares)	(25)	(33)
Expired or forfeited, weighted average exercise price (in dollars per share)	$ 7.85	$ 7.10
Options exercisable (in shares)	107	129
Options exercisable, weighted average exercise price (in dollars per share)	$ 9.24	$ 9.01
Options exercisable, weighted average remaining contractual term (Year)	2 years 182 days	3 years 36 days
Options exercisable, aggregate intrinsic value	$ 5	$ 155
Outstanding end of period (in shares)	107	132	218
Outstanding at end of period, weighted average exercise price (in dollars per share)	$ 9.24	$ 8.98	$ 8.60