Note 3 - Income Taxes - Reconciliation of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Computed expected tax expense	$ 1,301	$ 3,582	$ 5,299
State income taxes, net of federal income tax expense	(54)	252	253
Incremental tax expense (benefit) from foreign operations	137	(2,548)	(5,220)
Non-deductible equity compensation	(29)	254	258
Foreign withholding taxes	676	968	1,256
Net change in valuation allowance	16,861	2,564	1,657
Net change in contingency reserve	198	(379)	(594)
Non-deductible expenses	660	621	742
Benefit of tax credits	(1,243)	(3,186)	(1,345)
Subpart F income	345	254	283
Rate change impact	19	193	54
Benefit from liquidation utilized		(1,321)
Other	405	370	(4)
Income tax expense	$ 19,276	$ 1,624	$ 2,639