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Note 8 - Retirement Plans (Details Textual) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jan. 31, 2021 | Jan. 31, 2020
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage | 100.00% |
Defined Benefit Plan, Actual Return on Plan Assets Less Expected Return | $ 0.3 |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets | 7.50% | 7.50%
Other Comprehensive Income (Loss), Defined Benefit Plan, Actuarial Gain (Loss) Arising During Period, after Tax |  | $ (0.5)
Other Comprehensive Income (Loss), Defined Benefit Plan, Actuarial Gain Arising During Period, after Tax | $ 0.3 | 0.3
Other Comprehensive Income (Loss), Defined Benefit Plan, Loss Arising During Period, after Tax | $ 0.3 | $ 0.8
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate, Increase (Decrease) | (0.30%) | (1.10%)
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 | $ 0.3 | $ 0.3
Maximum [Member] |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Actuarial Gain (Loss) Arising During Period, after Tax | $ 0.1 |
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 16.00% |
Minimum [Member] |  |
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 1.00% |
Defined Benefit Plan, Equity Securities [Member] |  |
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage | 72.00% |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage |  | 60.00%
Defined Benefit Plan, Debt Security [Member] |  |
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage | 26.00% |
Other Debt Obligations [Member] |  |
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage | 2.00% |
Fixed Income Securities [Member] |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage |  | 30.00%
Alternative Investments [Member] |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage |  | 10.00%

X
- Definition 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. . + References No definition available. + Details
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- Definition The increase (decrease) in weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching payroll deferral contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage of payroll deferral contributions employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Definition Amount, after tax, of gain for decrease in value of benefit obligation for change in actuarial assumptions, that has not been recognized in net periodic benefit (cost) credit. + References No definition available. + Details
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- Definition Amount, before tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions, that has not been recognized in net periodic benefit (cost) credit. + References No definition available. + Details
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- Definition Amount, after tax, of loss for increase in value of benefit obligation for change in actuarial assumptions, that has not been recognized in net periodic benefit (cost) credit. + References No definition available. + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2919-114920 + Details
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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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