Note 9 - Retirement Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Interest cost	$ 237	$ 240
Expected return on plan assets	(450)	(522)
Recognized actuarial loss	102	64
Net periodic benefit income	(111)	(218)
Actuarial gain/(loss) on obligation	(787)	303
Actual (loss)/gain on plan assets	348	(644)
Total in other comprehensive income	$ 439	$ 341