Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
May 31, 2020	Jun. 02, 2019
Cash flows from operating activities:
Net earnings from continuing operations	$ 1,972	$ 2,714
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	277	366
Stock-based compensation	43	124
Deferred income taxes	(41)	97
Amortization of bond premium	(8)	(56)
Changes in operating assets and liabilities	2,498	(470)
Net cash provided by operating activities - continuing operations	4,741	2,775
Net cash used in operating activities - discontinued operations	(15)	(127)
Net cash provided by operating activities	4,726	2,648
Cash flows from investing activities:
Purchase of property, plant and equipment	(2,541)	(1,860)
Purchases of marketable securities	(15,008)	(34,046)
Proceeds from sales and maturities of marketable securities	19,500	14,196
Net cash provided by (used in) investing activities - continuing operations	1,951	(21,710)
Net cash used in investing activities - discontinued operations
Net cash provided by (used in) investing activities	1,951	(21,710)
Cash flows from financing activities:
Dividends paid	(2,038)	(2,049)
Proceeds from exercise of stock options		71
Purchase of treasury stock	(1,644)
Net cash used in financing activities - continuing operations	(3,682)	(1,978)
Net cash used in financing activities - discontinued operations
Net cash used in financing activities	(3,682)	(1,978)
Increase (decrease) in cash and cash equivalents before effect of exchange rate changes - continuing operations	3,010	(20,913)
Decrease in cash and cash equivalents before effect of exchange rate changes - discontinued operations	(15)	(127)
Increase (decrease) in cash and cash equivalents before effect of exchange rate changes	2,995	(21,040)
Effect of exchange rate changes on cash and cash equivalents - continuing operations
Effect of exchange rate changes on cash and cash equivalents - discontinued operations
Effect of exchange rate changes on cash and cash equivalents
Increase (decrease) in cash and cash equivalents:	2,995	(21,040)
Cash and cash equivalents, beginning of period	5,410	71,007
Cash and cash equivalents, end of period	8,405	49,967
Supplemental cash flow information:
Cash paid during the period for income taxes, net of refunds	$ (323)

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Name:	us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of noncash expense for share-based payment arrangement.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration