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

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Income Tax Expense (Benefit), Total	$ 9,872	$ 1,471	$ 10,587	$ 2,654
Effective Income Tax Rate Reconciliation, Percent, Total	(292.00%)	57.00%	(180.00%)	51.00%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	$ 10,000		$ 10,000
Unrecognized Tax Benefits, Ending Balance	1,300		1,300
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 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] \| Income Tax Autority, Thailand [Member]
Income Tax Examination, Year under Examination			2017
Foreign Tax Authority [Member] \| Tax and Customs Administration, Netherlands [Member]
Income Tax Examination, Year under Examination			2016