Note 3 - Marketable Securities (Tables)

3 Months Ended

Jun. 02, 2019

Notes Tables

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

	June 2, 2019
	Total		Level 1		Level 2		Level 3
U.S. Treasury and other government securities	$	89,111	$	89,111	$	-	$	-
U.S. corporate debt securities		11,979		11,979		-		-
Total marketable securities	$	101,090	$	101,090	$	-	$	-

	March 3, 2019
	Total		Level 1		Level 2		Level 3
U.S. Treasury and other government securities	$	68,718	$	68,718	$	-	$	-
U.S. corporate debt securities		11,899		11,899		-		-
Total marketable securities	$	80,617	$	80,617	$	-	$	-

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

	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses
June 2, 2019:
U.S. Treasury and other government securities	$	88,738	$	386	$	13
U.S. corporate debt securities		11,942		38		1
Total marketable securities	$	100,680	$	424	$	14
March 3, 2019:
U.S. Treasury and other government securities	$	68,727	$	44	$	53
U.S. corporate debt securities		11,924		7		32
Total marketable securities	$	80,651	$	51	$	85

Investments Classified by Contractual Maturity Date [Table Text Block]

Due in one year or less	$	16,500
Due after one year through five years		84,590
	$	101,090