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Note 8 - Retirement Plans - Asset Allocation (Details) - USD ($)
$ in Thousands
Jan. 31, 2023
Jan. 31, 2022
Jan. 31, 2021
Plan assets $ 917 $ 7,135 $ 7,016
Fair Value, Inputs, Level 1 [Member]      
Plan assets 0 5,985  
Fair Value, Inputs, Level 2 [Member]      
Plan assets 895 321  
Fair Value Measured at Net Asset Value Per Share [Member]      
Plan assets [1] 22 829  
Defined Benefit Plan, Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]      
Plan assets 0 4,119  
Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]      
Plan assets 0 1,544  
Defined Benefit Plan, Real Estate [Member] | Fair Value, Inputs, Level 1 [Member]      
Plan assets 0 322  
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]      
Plan assets $ 895 $ 321  
[1] Certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been categorized in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the reconciliation of benefit obligations, plan assets and funded status of the Pension Plan.