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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%