Note 2 - Fair Value Measurements (Details) - Changes in the Company’s Financial Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Auction Rate Securities [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 01, 2013
Auction Rate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance on March 2, 2013, net of temporary valuation adjustment	$ 49.0
Change in temporary valuation adjustment included in accumulated other comprehensive loss	(0.4)
Balance on June 1, 2013, net of temporary valuation adjustment	$ 48.6