Note 2 - Significant Accounting Policies - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Accumulated other comprehensive loss, excluding tax effect	$ (3,492)	$ (3,966)
Total accumulated other comprehensive loss	49,313	55,629	$ 51,701
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated other comprehensive loss, excluding tax effect	(1,590)	(1,879)
Tax effect of equity adjustment foreign currency	91	91
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated other comprehensive loss, excluding tax effect	(1,902)	(2,087)
Tax effect of equity adjustment foreign currency	114	115
AOCI Attributable to Parent [Member]
Total accumulated other comprehensive loss	$ (3,287)	$ (3,760)	$ (2,880)