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Note 8 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2019
Jan. 31, 2018
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 33.83%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability $ 100  
Foreign Earnings Repatriated 22,200 $ 23,200
Taxes Payable, Total 400  
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount 2,243
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount 145 $ (440)
Global Intangible Low-taxed Income (GILTI) $ 2,100  
Effective Income Tax Rate Reconciliation, Percent, Total 132.70% 2.30%
Income Tax Expense (Benefit), Total $ 2,150 $ (233)
Operating Loss Carryforwards, Total 35,600  
Deferred Tax Assets, Operating Loss Carryforwards, State and Local 2,552 2,157
Deferred Tax Assets, Operating Loss Carryforwards, Foreign 390 332
Deferred Tax Assets, Tax Credit Carryforwards, Foreign 2,305 $ 9,749
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total 100  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 300  
Foreign Tax Authority [Member] | Middle East [Member]    
Undistributed Earnings of Foreign Subsidiaries 26,300  
Foreign Tax Authority [Member] | UNITED ARAB EMIRATES    
Undistributed Earnings of Foreign Subsidiaries 18,700  
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries 0  
Foreign Tax Authority [Member] | SAUDI ARABIA    
Undistributed Earnings of Foreign Subsidiaries 7,500  
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries 1,500  
Foreign Tax Authority [Member] | Ministry of Finance, India [Member]    
Undistributed Earnings of Foreign Subsidiaries 4,600  
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries 900  
NOL Deferred Tax Asset [Member]    
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 4,900  
Foreign Credit Deferred Tax Asset [Member]    
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ (7,400)