Note 8 - Retirement Plans (Details Textual) - USD ($) $ in Thousands	12 Months Ended
Jan. 31, 2023	Jan. 31, 2022
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	$ (826)	$ (0)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax, Attributable to Parent, Total	100
Defined Benefit Plan, Expect Surplus Investment Balance	$ 900
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	100.00%
Defined Benefit Plan, Actual Return on Plan Assets Less Expected Return	$ 500
Other Comprehensive Income (Loss), Defined Benefit Plan, Actuarial Gain (Loss) Arising During Period, after Tax	(300)	400
Other Comprehensive Income (Loss), Defined Benefit Plan, Actuarial Loss Arising During Period, after Tax	500	100
Other Comprehensive Income (Loss), Defined Benefit Plan, Actuarial Gain Arising During Period, after Tax	$ 200	500
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate, Increase (Decrease)	0.50%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	1.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match, Payroll Deferral Contributions	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay, Payroll Deferral Contributions	5.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 300	$ 300
Minimum [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	1.00%
Maximum [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	16.00%
Defined Benefit Plan, Cash [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	100.00%
Other Nonoperating Income (Expense) [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	$ 900

Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses less the amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. .

No definition available.