Note 8 - Restructuring Charges (Details Textual) - USD ($)	12 Months Ended
Mar. 03, 2019	Feb. 25, 2018	Feb. 26, 2017
Restructuring Charges, Total		$ 146,000
Facility Closing [Member] \| Closure of Park Advanced Composite Materials, Inc. Business Unit [Member]
Restructuring Charges, Total	$ 0	$ 146,000	$ 0

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration