Consolidated Statements of Comprehensive Earnings (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Mar. 01, 2015	Mar. 02, 2014	Mar. 03, 2013
Net earnings (loss)	$ 20,043us-gaap_NetIncomeLoss	$ (42,329)us-gaap_NetIncomeLoss	$ 16,961us-gaap_NetIncomeLoss
Other comprehensive earnings, net of tax:
Foreign currency translation	185	420	75
Less: reclassification adjustment for foreign currency translation gains included in net earnings	0	0	(1,465)
Other comprehensive earnings (loss)	247	592	(1,448)
Total comprehensive earnings (loss)	20,290us-gaap_ComprehensiveIncomeNetOfTax	(41,737)us-gaap_ComprehensiveIncomeNetOfTax	15,513us-gaap_ComprehensiveIncomeNetOfTax
Gains On Marketable Securities [Member]
Other comprehensive earnings, net of tax:
Unrealized holding gains (losses) arising during the period	90	117	41
Less: reclassification adjustment for gains (losses) included in net income	(21)	(20)	(67)
Losses On Marketable Securities [Member]
Other comprehensive earnings, net of tax:
Unrealized holding gains (losses) arising during the period	(20)	(83)	(72)
Less: reclassification adjustment for gains (losses) included in net income	$ 13	$ 158	$ 40

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