Note 2 - Marketable Securities

12 Months Ended

Feb. 26, 2023

Notes to Financial Statements

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:

	February 26, 2023
	Total		Level 1		Level 2		Level 3
U.S. Treasury and other government securities	$	83,859	$	83,859	$	-	$	-
U.S. corporate debt securities		17,344		17,344		-		-
Total marketable securities	$	101,203	$	101,203	$	-	$	-

	February 27, 2021
	Total		Level 1		Level 2		Level 3
U.S. Treasury and other government securities	$	62,612	$	62,612	$	-	$	-
U.S. corporate debt securities		34,938		34,938		-		-
Total marketable securities	$	97,550	$	97,550	$	-	$	-

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
February 26, 2023:
U.S. Treasury and other government securities	$	89,603	$	-	$	5,744
U.S. corporate debt securities		17,414		-		70
Total marketable securities	$	107,017	$	-	$	5,814
February 27, 2022:
U.S. Treasury and other government securities	$	65,177	$	5	$	2,570
U.S. corporate debt securities		35,064		5		131
Total marketable securities	$	100,241	$	10	$	2,701

	Fiscal Year
	2023		2022		2021
Gross realized gains on sale	$	-	$	26	$	155
Gross realized losses on sale	$	5	$	36	$	145

The estimated fair values of such securities at February 26, 2023, by contractual maturity, are shown below:

Due in one year or less	$	30,625
Due after one year through five years		70,578
	$	101,203