Note 7 - Income Taxes - Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Balance at beginning of the year	$ 1,591	$ 1,545
Increases in positions taken in a prior period	(4)
Increases in positions taken in a prior period		2
Increases in positions taken in a current period	66	65
Decreases due to lapse of statute of limitations	(8)	(21)
Decreases due to settlements	(34)	0
Balance at end of the year	$ 1,611	$ 1,591