Note 4 - Income Taxes - Reconciliation of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Computed expected tax (benefit) expense	$ (757)	$ 2,503	$ (1,431)
State income taxes, net of federal income tax expense	(581)	96	(157)
Incremental tax expense from foreign operations	1,256	715	923
Equity compensation	(4,198)	(2,916)	(1,004)
Foreign withholding taxes	1,103	1,089	794
Net increase in valuation allowance	16,179	3,224	5,448
Net change in uncertain tax positions	3	(71)	(81)
Non-deductible expenses	218	1,149	(407)
Benefit of tax credits	(1,719)	(3,483)	(1,766)
Subpart F income	27	101	302
U.S. Tax Reform (the “Tax Act”)		(1,312)	1,951
Rate change impact	867	124	187
Other	(53)	270	98
Total	$ 12,345	$ 1,489	$ 4,857