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Note 17 - Income Taxes (Details Textual) - USD ($) $ in Millions | 11 Months Ended | 12 Months Ended | 13 Months Ended
--- | --- | --- | ---
Dec. 31, 2017 | Jan. 31, 2018 | Jan. 31, 2017 | Jan. 31, 2016 | Jan. 31, 2019
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  | 26.50% | 26.50% | 26.50% |
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  | $ (0.7) |  |  |
Decrease in Deferred Tax Assets, AMT Elimination |  | $ 1.9 |  |  |
Income Before Taxes, Percent |  | 23.00% | 24.00% | 26.00% |
Effective Income Tax Rate Reconciliation, Percent |  | 19.00% | 13.00% | 5.00% |
Increase (Decrease) In Current Tax Expense Due to Estimate of Uncertain Tax Positions |  | $ 1.5 | $ 0.7 |  |
Increase (Decrease) in Current Tax Expense Due to Less Income Being Sheltered by Loss Carry-forwards and Other Attributes |  | 0.8 |  |  |
Increase (Decrease) In Current Tax Expense Due To Income Tax of Previous Periods |  | 0.3 | 0.5 |  |
Increase Decrease In Currentl Tax Expense Due To Nondectible Expenses |  |  | $ 1.7 |  |
Decrease in Deferred Income Tax Expense, Tax Rates Reductions in Us and EMEA |  | 1.1 |  |  |
Decrease in Deferred Income Tax Expense, Stock Compensation |  | 0.7 |  |  |
Undistributed Earnings of Foreign Subsidiaries |  | 284.1 |  |  |
Liability for Uncertainty in Income Taxes, Noncurrent |  | 9.0 |  |  |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate |  | 8.7 |  |  |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit |  | $ 1.0 |  |  |
Foreign Tax Authority [Member] | Internal Revenue Service (IRS) [Member] |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 35.00% |  |  |  |
Foreign Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Scenario, Forecast [Member] |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  |  | 21.00%

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