Note 11. Restructuring costs (Details) - Summary of Restructuring Costs, Outstanding Payable Balance and Cumulative Restructuring Costs (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	3 Months Ended		12 Months Ended		3 Months Ended		12 Months Ended	3 Months Ended		12 Months Ended	3 Months Ended		12 Months Ended
	Aug. 03, 2013	Aug. 03, 2013	Aug. 03, 2013 Employee Severance [Member]	May 04, 2013 Employee Severance [Member]	Feb. 02, 2013 Employee Severance [Member]	Feb. 02, 2013 Impairment of Long-Lived Assets [Member]	Aug. 03, 2013 Facility Closing [Member]	May 04, 2013 Facility Closing [Member]	Feb. 02, 2013 Facility Closing [Member]	Aug. 03, 2013 Total Restructuring Charges [Member]	May 04, 2013 Total Restructuring Charges [Member]	Feb. 02, 2013 Total Restructuring Charges [Member]	Aug. 03, 2013 Cumulative Restructuring Costs [Member]	May 04, 2013 Cumulative Restructuring Costs [Member]	Feb. 02, 2013 Cumulative Restructuring Costs [Member]
Restructuring Cost and Reserve [Line Items]
Charges	$ 680	$ 890	$ 234	$ 250	$ 2,167	$ 1,089	$ 446		$ 8	$ 680	$ 250	$ 3,264	$ 680	$ 250	$ 3,264
Cash payments			(551)	(882)	(1,153)		(14)	(5)		(565)	(887)	(1,153)
Non-cash items						(1,089)						(1,089)
Balance			$ 65	$ 382	$ 1,014		$ 435	$ 3	$ 8	$ 500	$ 385	$ 1,022	$ 4,194	$ 3,514	$ 3,264