Note 9 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Jan. 31, 2020
Income Tax Expense (Benefit), Total	$ 995	$ 715
Effective Income Tax Rate Reconciliation, Percent, Total	170.00%	(28.00%)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	$ 600
Unrecognized Tax Benefits, Ending Balance	1,200	$ 1,300
Unrecognized Tax Benefits, Period Increase (Decrease), Total	1,000	1,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	100	$ 100
Deferred Tax Assets, Valuation Allowance, Total	$ 51,400		$ 51,000
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]
Deferred Tax Assets, Valuation Allowance, Total	$ 2,500		$ 2,600
Income Tax Examination, Year under Examination	2015 2016 2017
Foreign Tax Authority [Member] | Income Tax Autority, Thailand [Member]
Income Tax Examination, Year under Examination	2018