Note 4 - Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Unrecognized tax benefits at beginning of the year	$ 1,168	$ 1,662
Decreases as a result of tax positions taken in a prior period		(26)
Increases as a result of tax positions taken in the prior period	143
Reduction as a result of a lapse of the statute of limitations	(37)	(44)
Decreases as a result of settlements with taxing authorities	(103)	(424)
Unrecognized tax benefit at end of year	$ 1,171	$ 1,168