Note 10 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Stock-based compensation expense	$ 1,011	$ 1,165
Share-based Payment Arrangement, Option [Member]
Stock-based compensation expense	12	33
Restricted Stock [Member]
Stock-based compensation expense	$ 999	$ 1,132