Note 3 - Income Taxes - Reconciliation of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Computed expected tax expense (benefit)	$ (1,431)	$ 1,301	$ 3,582
State income taxes, net of federal income tax expense	(157)	(54)	252
Incremental tax expense (benefit) from foreign operations	923	137	(2,548)
Non-deductible equity compensation	(1,004)	(29)	254
Foreign withholding taxes	794	676	968
Net change in valuation allowance	5,448	16,861	2,564
Net change in contingency reserve	(81)	198	(379)
Non-deductible expenses	(407)	660	621
Benefit of tax credits	(1,766)	(1,243)	(3,186)
Subpart F income	302	345	254
Rate change impact	187	19	193
Benefit from liquidation utilized			(1,321)
U.S. Tax Reform (the “Tax Act”)	1,951
Other	98	405	370
Total	$ 4,857	$ 19,276	$ 1,624