Note 11. Restructuring costs (Details) (USD $)	3 Months Ended				9 Months Ended		12 Months Ended	3 Months Ended			9 Months Ended	12 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	3 Months Ended	12 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	3 Months Ended			12 Months Ended
	Nov. 02, 2013	Aug. 03, 2013	May 04, 2013	Oct. 27, 2012	Nov. 02, 2013	Oct. 27, 2012	Feb. 02, 2013	Nov. 02, 2013 Cost of Sales [Member]	Aug. 03, 2013 Cost of Sales [Member]	May 04, 2013 Cost of Sales [Member]	Nov. 02, 2013 Cost of Sales [Member]	Feb. 02, 2013 Cost of Sales [Member]	Nov. 02, 2013 Operating Expense [Member]	Aug. 03, 2013 Operating Expense [Member]	May 04, 2013 Operating Expense [Member]	Feb. 02, 2013 Operating Expense [Member]	Nov. 02, 2013 Operating Expense [Member] Minimum [Member]	Feb. 02, 2013 Operating Expense [Member] Minimum [Member]	Nov. 02, 2013 Operating Expense [Member] Maximum [Member]	Feb. 02, 2013 Operating Expense [Member] Maximum [Member]	Feb. 02, 2013 Cost of Goods Sold [Member]	Nov. 02, 2013 Research and Development Expense [Member]	Aug. 03, 2013 Research and Development Expense [Member]	Feb. 02, 2013 Research and Development Expense [Member]	Nov. 02, 2013 Selling and Marketing Expense [Member]	Feb. 02, 2013 Selling and Marketing Expense [Member]	Nov. 02, 2013 General and Administrative Expense [Member]	Aug. 03, 2013 General and Administrative Expense [Member]	Feb. 02, 2013 General and Administrative Expense [Member]	Nov. 02, 2013 Headcount Expense [Member] Minimum [Member]	Feb. 02, 2013 Headcount Expense [Member] Minimum [Member]	Nov. 02, 2013 Headcount Expense [Member] Maximum [Member]	Feb. 02, 2013 Headcount Expense [Member] Maximum [Member]	Nov. 02, 2013 Canada and California [Member] Facility Closing [Member]	Nov. 02, 2013 Employee Severance [Member]	Nov. 02, 2013 Employee Severance [Member]	Aug. 03, 2013 Employee Severance [Member]	May 04, 2013 Employee Severance [Member]	May 04, 2013 Employee Severance [Member]	Dec. 31, 2013 Employee Severance [Member]	Nov. 02, 2013 Facility Closing [Member]	Aug. 03, 2013 Facility Closing [Member]	Aug. 03, 2013 Facility Closing [Member]	Dec. 31, 2013 Facility Closing [Member]
Note 11. Restructuring costs (Details) [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated	17	8	17				114
Restructuring and Related Cost, Incurred Cost							$ 3,200,000			$ 33,000		$ 100,000			$ 210,000	$ 3,100,000					$ 0			$ 2,400,000		$ 400,000			$ 400,000
Restructuring Costs																	400,000	400,000	500,000	500,000										4,000,000	14,000,000	4,500,000	14,500,000
Restructuring Charges	1,104,000			821,000	1,994,000	821,000		0	100,000		40,000,000		1,100,000	700,000								800,000	100,000		100,000		200,000	500,000						100,000	968,000	1,000,000	234,000	250,000	200,000	2,167,000	137,000	446,000	500,000	8,000
Severance Costs		$ 200,000