Note 8 - Income Taxes - Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Balance at beginning of the year	$ 1,447	$ 1,301
Decreases in positions taken in a prior period	(26)
Increases in positions taken in a prior period		9
Increases in positions taken in a current period	132	147
Decreases due to lapse of statute of limitations	(8)	(10)
Balance at end of the year	$ 1,545	$ 1,447