Note 2 - Marketable Securities (Tables)

12 Months Ended

Mar. 03, 2019

Notes Tables

Fair Value, Separate Account Investment [Table Text Block]

	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	$	-	$	-

	February 25, 2018
	Total		Level 1		Level 2		Level 3
U.S. Treasury and other government securities	$	78,361	$	78,361	$	-	$	-
U.S. corporate debt securities		11,616		11,616		-		-
Total marketable securities	$	89,977	$	89,977	$	-	$	-

Schedule of Unrealized Loss on Investments [Table Text Block]

	Amortized Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses
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
February 25, 2018:
U.S. Treasury and other government securities	$	80,116	$	-	$	1,755
U.S. corporate debt securities		11,675		-		59
Total marketable securities	$	91,791	$	-	$	1,814

Realized Gain (Loss) on Investments [Table Text Block]

	Fiscal Year
	2019		2018		2017
Gross realized gains on sale	$	-	$	-	$	-
Gross realized losses on sale	$	1,498	$	1,342	$	-

Investments Classified by Contractual Maturity Date [Table Text Block]

Due in one year or less	$	8,453
Due after one year through five years		72,164
	$	80,617