Note 4 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2019	Jan. 31, 2018
Allowance for doubtful accounts and sales adjustments	$ 520	$ 367
Accrued vacation	1,568	1,590
Tax credits	20,908	18,583
Deferred revenue	2,849	3,493
Net operating loss carry forwards	10,597	10,337
Accrued expenses - other	1,802	1,849
Other comprehensive income	1,189	1,164
Section 263(a) interest capitalization	198	206
Intellectual property	7,917
Equity compensation	4,626	4,380
Carryforward of Irish amortization	1,630
Other	2,345	1,243
Total deferred tax assets	56,149	43,212
Less valuation allowance	(34,898)	(33,665)
Less netting of unrecognized tax benefits against deferred tax assets	(886)	(930)
Deferred tax assets, net of valuation allowance	20,365	8,617
Depreciation and amortization	(804)	(442)
Topic 606: capitalized commissions and cloud costs	(2,891)
Other	(498)	(231)
Total deferred tax liabilities	(4,193)	(673)
Total net deferred tax assets	$ 16,172	$ 7,944