Consolidated Statements of Comprehensive Earnings (Unaudited) - USD ($)	3 Months Ended
	May 29, 2016	May 31, 2015
Gains on Marketable Securities [Member]
Unrealized gains on marketable securities:
Unrealized holding gains (losses) arising during the period	$ 80,000	$ 103,000
Less: reclassification adjustment for gains (losses) included in net earnings	(148,000)	(3,000)
Losses on Marketable Securities [Member]
Unrealized gains on marketable securities:
Unrealized holding gains (losses) arising during the period	(13,000)	(31,000)
Less: reclassification adjustment for gains (losses) included in net earnings	17,000
Net earnings	2,950,000	4,777,000
Foreign currency translation	(21,000)	55,000
Other comprehensive (loss) earnings	85,000	(124,000)
Total comprehensive earnings	$ 2,865,000	$ 4,901,000