Note 7 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Taxes Payable, Total	$ 200	$ 400
Effective Income Tax Rate Reconciliation, Percent, Total	1.70%	29.00%
Operating Loss Carryforwards, Total	$ 41,100
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	2,678	$ 2,567
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	543	223
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	2,580	2,580
Unrecognized Tax Benefits, Ending Balance	1,591	1,545	$ 1,447
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	500
Other Noncurrent Liabilities [Member]
Unrecognized Tax Benefits, Ending Balance	200	$ 100
Foreign Tax Authority [Member] | Middle East [Member]
Undistributed Earnings of Foreign Subsidiaries	22,400
Foreign Tax Authority [Member] | UNITED ARAB EMIRATES
Undistributed Earnings of Foreign Subsidiaries	15,700
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	6,800
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries	100
Foreign Tax Authority [Member] | Ministry of Finance, India [Member]
Undistributed Earnings of Foreign Subsidiaries	4,400
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries	$ 900