Note 19 - Income taxes (Details) - Deferred Tax Assets and Liabilities (USD $) In Thousands, unless otherwise specified	Feb. 01, 2014	Feb. 02, 2013
Deferred tax assets:
Net operating loss	$ 4,999	$ 8,426
Investment impairment	1,704	1,519
Allowance, reserve and other	6,700	8,126
Depreciation	1,222	2,598
Tax credits	6,642	10,936
Stock-based compensation	9,661	10,840
Total gross deferred tax assets	30,928	42,445
Valuation allowance	(26,479)	(33,305)
Total net deferred tax assets	4,449	9,140
Deferred tax liabilities:
Acquired intangibles and other	(842)	(1,395)
Total net deferred tax assets	$ 3,607	$ 7,745