Consolidated Statements of Comprehensive Earnings (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Nov. 30, 2014	Dec. 01, 2013	Nov. 30, 2014	Dec. 01, 2013
Net earnings	$ 2,031us-gaap_NetIncomeLoss	$ 4,721us-gaap_NetIncomeLoss	$ 15,202us-gaap_NetIncomeLoss	$ 17,695us-gaap_NetIncomeLoss
Other comprehensive earnings (loss), net of tax:
Foreign currency translation	(77)	9	(153)	210
Unrealized gains on marketable securities:
Other comprehensive earnings (loss)	(3)	245	(60)	405
Total comprehensive earnings	2,028us-gaap_ComprehensiveIncomeNetOfTax	4,966us-gaap_ComprehensiveIncomeNetOfTax	15,142us-gaap_ComprehensiveIncomeNetOfTax	18,100us-gaap_ComprehensiveIncomeNetOfTax
Gains on Marketable Securities [Member]
Unrealized gains on marketable securities:
Unrealized holding gains (losses) arising during the period	84	176	116	153
Less: reclassification adjustment for gains included in net earnings	(8)		(13)
Losses on Marketable Securities [Member]
Unrealized gains on marketable securities:
Unrealized holding gains (losses) arising during the period	(7)		(16)	(62)
Less: reclassification adjustment for gains included in net earnings	$ 5	$ 60	$ 6	$ 104

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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