Note 10 - 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, 2020	Jan. 31, 2019	Jan. 31, 2018
Outstanding beginning of period (in shares)	218	358
Outstanding at beginning of period, weighted average exercise price (in dollars per share)	$ 8.60	$ 9.44
Outstanding weighted average remaining contractual term (Year)	3 years 73 days	3 years 292 days	4 years
Outstanding at beginning of period, aggregate intrinsic value	$ 160	$ 257	$ 482
Exercised (in shares)	(53)	(77)
Exercised, weighted average exercise price (in dollars per share)	$ 6.91	$ 6.83
Exercised, aggregate intrinsic value	$ 162	$ 162
Canceled options during the year (in shares)	(33)	(63)
Expired or forfeited, weighted average exercise price (in dollars per share)	$ 7.10	$ 16.20
Options exercisable (in shares)	129	207
Options exercisable, weighted average exercise price (in dollars per share)	$ 9.01	$ 8.69
Options exercisable, weighted average remaining contractual term (Year)	3 years 51 days	3 years 219 days
Options exercisable, aggregate intrinsic value	$ 155	$ 239
Outstanding end of period (in shares)	132	218	358
Outstanding at end of period, weighted average exercise price (in dollars per share)	$ 8.98	$ 8.60	$ 9.44