Note 2 - Marketable Securities

12 Months Ended

Mar. 02, 2014

Investments, Debt and Equity Securities [Abstract]

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

2. MArketable Securities

The following is a summary of available-for-sale securities:

	March 2, 2014
	Total		Level 1		Level 2		Level 3
U.S. Treasury and other government securities	$	112,793	$	112,793	$	-	$	-
U.S. corporate debt securities		24,413		17,329		7,084	$	-
Total marketable securities	$	137,206	$	130,122	$	7,084	$	-

	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	$	-

At March 2, 2014 and March 3, 2013, the Company’s level 2 investments consisted of commercial paper which was not traded on a regular basis or in an active market, and the Company was unable to obtain pricing information on an on-going basis. Therefore, these investments were measured using quoted market prices for similar assets currently trading in an active market or using model-derived valuations in which all significant inputs were observable for substantially the full term of the asset.

The following tables show the amortized cost basis, gross unrealized gains and losses and gross realized gains and losses on the Company’s available-for-sale securities:

	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses
March 2, 2014:
U.S. Treasury and other government securities	$	112,593	$	200	$	-
U.S. corporate debt securities		24,401		13		1
Total marketable securities	$	136,994	$	213	$	1
March 3, 2013:
U.S. Treasury and other government securities	$	48,293	$	47	$	48
U.S. corporate debt securities		40,859		11		63
Total marketable securities	$	89,152	$	58	$	111

	Fiscal Year
	2014		2013		2012
Gross realized gains on sale	$	26	$	9	$	43
Gross realized losses on sale		209		35		65

The estimated fair values of such securities at March 2, 2014, by contractual maturity, are shown below:

Due in one year or less	$	73,301
Due after one year through five years		63,905
	$	137,206