Note 3 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Allowance for doubtful accounts and sales adjustments	$ 356	$ 486
Accrued vacation	2,033	1,900
Tax credits	13,116	11,025
Deferred revenue	3,465	3,520
Net operating loss carry forwards	10,255	7,965
Accrued expenses - other	1,695	1,557
Other comprehensive income		1,483
Section 263(a) interest capitalization	322	333
Equity compensation	5,399	4,631
Other	2,039	2,111
Total deferred tax assets	38,680	35,011
Less valuation allowance	(29,868)	(13,480)
Less netting of unrecognized tax benefits against deferred tax assets	(954)	(1,042)
Deferred tax assets, net of valuation allowance	7,858	20,489
Depreciation and amortization	(630)	(249)
Other comprehensive income	(1,009)
Other	(53)	(118)
Total deferred tax liabilities	(1,692)	(367)
Total net deferred tax assets	$ 6,166	$ 20,122