Consolidated Statements of Comprehensive Earnings (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 31, 2014	Sep. 01, 2013	Aug. 31, 2014	Sep. 01, 2013
Net earnings	$ 4,955	$ 8,045	$ 13,171	$ 12,974
Other comprehensive earnings (loss), net of tax:
Foreign currency translation	18	(135)	(76)	201
Unrealized gains on marketable securities:
Other comprehensive earnings (loss)	6	(205)	(59)	160
Total comprehensive earnings	4,961	7,840	13,112	13,134
Gains On Marketable Securities [Member]
Unrealized gains on marketable securities:
Unrealized holding gains (losses) arising during the period		4	22	6
Losses On Marketable Securities [Member]
Unrealized gains on marketable securities:
Unrealized holding gains (losses) arising during the period	(12)	(75)	(5)	(91)
Less: reclassification adjustment for losses included in net earnings		$ 1		$ 44