Note 3 - Marketable Securities (Tables)

3 Months Ended

May 30, 2021

Notes Tables

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

	May 30, 2021
	Total		Level 1		Level 2		Level 3
U.S. Treasury and other government securities	$	60,395	$	60,395	$	-	$	-
U.S. corporate debt securities		17,124		17,124		-		-
Total marketable securities	$	77,519	$	77,519	$	-

	February 28, 2021
	Total		Level 1		Level 2		Level 3
U.S. Treasury and other government securities	$	56,906	$	56,906	$	-	$	-
U.S. corporate debt securities		18,041		18,041		-		-
Total marketable securities	$	74,947	$	74,947	$	-	$	-

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

	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses
May 30, 2021:
U.S. Treasury and other government securities	$	60,814	$	119	$	538
U.S. corporate debt securities		17,095		41		12
Total marketable securities	$	77,909	$	160	$	550
February 28, 2021:
U.S. Treasury and other government securities	$	57,400	$	153	$	647
U.S. corporate debt securities		18,008		52		19
Total marketable securities	$	75,408	$	205	$	666

Investments Classified by Contractual Maturity Date [Table Text Block]

Due in one year or less	$	60,400
Due after one year through five years		17,119
	$	77,519