Note 4 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Allowance for doubtful accounts and sales adjustments	$ 600	$ 520
Accrued vacation	1,499	1,568
Tax credits	22,077	20,908
Deferred revenue	3,136	2,849
ASC 842 lease liabilities	4,142
Net operating loss carry forwards	15,475	10,597
Accrued expenses - other	2,038	1,802
Other comprehensive income	1,603	1,189
Section 263(a) interest capitalization	190	198
Intellectual property	6,250	7,917
Equity compensation	3,579	4,626
Carryforward of Irish amortization	3,614	1,630
Other	1,767	2,345
Total deferred tax assets	65,970	56,149
Less valuation allowance	(50,972)	(34,898)
Less netting of unrecognized tax benefits against deferred tax assets	(973)	(886)
Deferred tax assets, net of valuation allowance	14,025	20,365
Depreciation and amortization	(851)	(804)
Topic 606: capitalized commissions and cloud costs	(3,054)	(2,891)
ASC 842 right of use assets	(3,931)
Other	(355)	(498)
Total deferred tax liabilities	(8,191)	(4,193)
Total net deferred tax assets	$ 5,834	$ 16,172