Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Income Tax Expense (Benefit), Total	$ 1,404	$ 597	$ 11,991	$ 3,251
Effective Income Tax Rate Reconciliation, Percent, Total	92.00%	17.00%	(275.00%)	37.00%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		$ 800	$ 10,800
Unrecognized Tax Benefits, Ending Balance	$ 1,200		1,200
Unrecognized Tax Benefits, Period Increase (Decrease), Total			1,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 100		$ 100
Foreign Tax Authority [Member] \| Ministry of Finance, India [Member]
Income Tax Examination, Year under Examination			2010 2013 2018
Foreign Tax Authority [Member] \| Federal Ministry of Finance, Germany [Member]
Income Tax Examination, Year under Examination			2015 2016 2017
Foreign Tax Authority [Member] \| Tax and Customs Administration, Netherlands [Member]
Income Tax Examination, Year under Examination			2016

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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