Note 18. Income taxes (Detail) - Deferred Tax Assets And Liabilities (USD $) In Thousands, unless otherwise specified	Feb. 02, 2013	Jan. 28, 2012
Deferred tax assets:
Net operating loss	$ 8,426	$ 8,015
Investment impairment	1,519	1,823
Allowance, reserve and other	8,126	5,272
Depreciation	2,598	3,421
Tax credits	10,936	10,022
Stock-based compensation	10,840	11,072
Total gross deferred tax assets	42,445	39,625
Valuation allowance	(33,305)	(17,109)
Total net deferred tax assets	9,140	22,516
Deferred tax liabilities:
Acquired intangibles and other	(1,395)	(2,151)
Total net deferred tax assets	$ 7,745	$ 20,365