Note 4 - Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
U.S. federal	$ 471	$ (829)	$ 2,862
State	130	(13)	38
Foreign	2,149	3,784	2,433
Subtotal	2,750	2,942	5,333
U.S. federal	25	79	(519)
State	(107)	(30)	19
Foreign	9,677	(1,502)	24
Subtotal	9,595	(1,453)	(476)
Total	$ 12,345	$ 1,489	$ 4,857