Note 3 - Marketable Securities (Tables)

9 Months Ended

Nov. 26, 2023

Notes Tables

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

	November 26, 2023
	Total		Level 1		Level 2		Level 3
U.S. Treasury and other government securities	$	66,434	$	66,434	$	-	$	-
U.S. corporate debt securities		3,382		3,382		-		-
Total marketable securities	$	69,816	$	69,816	$	-	$	-

	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	$	-	$	-

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

	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses
November 26, 2023:
U.S. Treasury and other government securities	$	70,442	$	-	$	4,008
U.S. corporate debt securities		3,385		-		3
Total marketable securities	$	73,827	$	-	$	4,011
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

Investments Classified by Contractual Maturity Date [Table Text Block]

Due in one year or less	$	18,105
Due after one year through five years		51,711
	$	69,816