Note 18. Subsequent events (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		0 Months Ended
	May 04, 2013	Apr. 28, 2012	May 30, 2013 Subsequent Event [Member]	May 16, 2013 Subsequent Event [Member]
Notes Payable				$ 2.5
Debt Instrument, Decrease, Forgiveness				1.7
Reductions in Design and Development Costs			1.5
Reductions in Compensation and Benefit Expense			1.0
Facility Costs			0.7
Depreciation, Depletion and Amortization, Nonproduction	$ 2.9	$ 2.7	$ 0.4