Note 3 - Marketable Securities (Tables)

6 Months Ended

Aug. 28, 2022

Notes Tables

Debt Securities, Available-for-Sale [Table Text Block]

	August 28, 2022
	Total		Level 1		Level 2		Level 3
U.S. Treasury and other government securities	$	71,438	$	71,438	$	-	$	-
U.S. corporate debt securities		27,192		27,192		-		-
Total marketable securities	$	98,630	$	98,630	$	-	$	-

	February 27, 2022
	Total		Level 1		Level 2		Level 3
U.S. Treasury and other government securities0	$	62,612	$	62,612	$	-	$	-
U.S. corporate debt securities		34,938		34,938		-		-
Total marketable securities	$	97,550	$	97,550	$	-	$	-

Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]

	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses
August 28, 2022:
U.S. Treasury and other government securities	$	76,128	$	-	$	4,690
U.S. corporate debt securities		27,386		-		194
Total marketable securities	$	103,514	$	-	$	4,884
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

Investments Classified by Contractual Maturity Date [Table Text Block]

Due in one year or less	$	35,873
Due after one year through five years		62,757
	$	98,630