Note 3 - Marketable Securities (Tables)

9 Months Ended

Dec. 01, 2013

Table Text Block [Abstract]

Schedule of Fair Value of Separate Accounts by Major Category of Investment [Table Text Block]

	December 1, 2013
	Total		Level 1		Level 2		Level 3
U.S. Treasury and other government securities	$	134,266	$	134,266	$	-	$	-
U.S. corporate debt securities		28,315		21,215		7,100		-
Total marketable securities	$	162,581	$	155,481	$	7,100	$	-

	March 3, 2013
	Total		Level 1		Level 2		Level 3
U.S. Treasury and other government securities	$	58,299	$	58,299	$	-	$	-
U.S. corporate debt securities		30,800		20,859		9,941		-
Total marketable securities	$	89,099	$	79,158	$	9,941	$	-

Available-for-sale Securities [Table Text Block]

	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses
December 1, 2013:
U.S. Treasury and other government securities	$	134,020	$	248	$	2
U.S. corporate debt securities		28,314		5		4
Total marketable securities	$	162,334	$	253	$	6
March 3, 2013:
U.S. Treasury and other government securities	$	48,293	$	7	$	9
U.S. corporate debt securities		40,859		12		63
Total marketable securities	$	89,152	$	19	$	72

Investments Classified by Contractual Maturity Date [Table Text Block]

Due in one year or less	$	105,656
Due after one year through five years		56,925
	$	162,581