Note 8 - Retirement Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Interest cost	$ 173	$ 190
Expected return on plan assets	(514)	(479)
Recognized actuarial loss	119	139
Net periodic benefit income	(222)	(150)
Actuarial gain/(loss) on obligation	511	(256)
Actual gain/(loss) on plan assets	(90)	302
Amounts recognized in current year	119	139
Total in other comprehensive income	$ (540)	$ (185)