Note 13 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 28, 2017	Jan. 30, 2016
Deferred tax assets:
Net operating loss	$ 11,196	$ 7,593
Investment impairment	545	1,131
Allowance, reserve and other	4,552	4,039
Depreciation	212	419
Tax credits	14,790	12,194
Stock-based compensation	6,636	8,420
Total gross deferred tax assets	37,931	33,796
Valuation allowance	(35,073)	(31,529)
Total deferred tax assets	2,858	2,267
Deferred tax liabilities:
Unrealized foreign exchange loss	(594)	(60)
Acquired intangibles and other	(1,926)	(1,613)
Net deferred tax assets	$ 338	$ 594