Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2019	Apr. 30, 2018	Jan. 31, 2019
Income Tax Expense (Benefit), Total	$ 715	$ 1,183
Effective Income Tax Rate Reconciliation, Percent, Total	28.00%	46.00%
Unrecognized Tax Benefits, Ending Balance	$ 1,300
Unrecognized Tax Benefits, Period Increase (Decrease), Total	1,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	100
Deferred Tax Assets, Valuation Allowance, Total	$ 35,600		$ 34,900
Foreign Tax Authority [Member] \| Ministry of Finance, India [Member]
Income Tax Examination, Year under Examination	2010 2013 2014
Foreign Tax Authority [Member] \| Federal Ministry of Finance, Germany [Member]
Income Tax Examination, Year under Examination	2015 2016 2017
Foreign Tax Authority [Member] \| Swiss Federal Tax Administration (FTA) [Member]
Income Tax Examination, Year under Examination	2014 2015 2016 2017 2018
Foreign Tax Authority [Member] \| Tax and Customs Administration, Netherlands [Member]
Income Tax Examination, Year under Examination	2016

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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

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