Note 4 - Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
U.S. federal	$ 997	$ 471	$ (829)
State	37	130	(13)
Foreign	2,376	2,149	3,784
Subtotal	3,410	2,750	2,942
U.S. federal	3	25	79
State	6	(107)	(30)
Foreign	(3,663)	9,677	(1,502)
Subtotal	(3,654)	9,595	(1,453)
Total income tax (benefit) expense	$ (244)	$ 12,345	$ 1,489