Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020	Jan. 31, 2021
Income Tax Expense (Benefit), Total	$ 967	$ 440	$ (409)	$ 1,435
Effective Income Tax Rate Reconciliation, Percent, Total	(18.00%)	88.00%	8.00%	132.00%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount			$ 2,000
Unrecognized Tax Benefits, Ending Balance	$ 1,400		1,400		$ 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	100	$ 100
Deferred Tax Assets, Valuation Allowance, Total	$ 48,300		$ 48,300		$ 48,600
Foreign Tax Authority [Member] | Ministry of Finance, India [Member]
Income Tax Examination, Year under Examination			2010 2013 2018 2020
Foreign Tax Authority [Member] | Directorate General of Taxes, Indonesia [Member]
Income Tax Examination, Year under Examination			2019