Note 2 - Significant Accounting Policies - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Accumulated other comprehensive loss, excluding tax effect	$ (3,309)	$ (3,492)
Total accumulated other comprehensive loss	54,457	49,313	$ 55,629
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated other comprehensive loss, excluding tax effect	(1,947)	(1,590)
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	(1,362)	(1,902)
Tax effect of equity adjustment foreign currency	114	114
AOCI Attributable to Parent [Member]
Total accumulated other comprehensive loss	$ (3,104)	$ (3,287)	$ (3,760)