Note 2 - Significant Accounting Policies - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Accumulated other comprehensive loss, excluding tax effect	$ (5,804)	$ (6,707)
Total accumulated other comprehensive loss	65,712	57,784	$ 54,457
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated other comprehensive loss, excluding tax effect	(5,804)	(6,707)
Tax effect of equity adjustment foreign currency	253	258
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated other comprehensive loss, excluding tax effect	0	0
Tax effect of equity adjustment foreign currency	0	0
AOCI Attributable to Parent [Member]
Total accumulated other comprehensive loss	$ (5,551)	$ (6,449)	$ (3,104)