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Note 9 - Restructuring Charges - Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 28, 2021	Nov. 29, 2020	Nov. 28, 2021	Nov. 29, 2020
Current Period Charges	$ 13	$ 0	$ 197	$ 0
Closure of Park Advanced Composite Materials, Inc. Business Unit [Member]
Accrued, Beginning Balance			252
Current Period Charges			197
Cash Payments			(241)
Non-Cash Charges			(22)
Accrued, Ending Balance	186		186
Total Costs Accrued to Date	1,767		1,767
Facility Lease Costs [Member] \| Closure of Park Advanced Composite Materials, Inc. Business Unit [Member]
Accrued, Beginning Balance			252
Current Period Charges			0
Cash Payments			(44)
Non-Cash Charges			(22)
Accrued, Ending Balance	186		186
Total Costs Accrued to Date	252		252
Asset Impairment [Member] \| Closure of Park Advanced Composite Materials, Inc. Business Unit [Member]
Accrued, Beginning Balance			0
Current Period Charges			0
Cash Payments			0
Non-Cash Charges			0
Accrued, Ending Balance	0		0
Total Costs Accrued to Date	1,318		1,318
Asset Removal [Member] \| Closure of Park Advanced Composite Materials, Inc. Business Unit [Member]
Accrued, Beginning Balance			0
Current Period Charges			154
Cash Payments			(154)
Non-Cash Charges			0
Accrued, Ending Balance	0		0
Total Costs Accrued to Date	154		154
Other Restructuring [Member] \| Closure of Park Advanced Composite Materials, Inc. Business Unit [Member]
Accrued, Beginning Balance			0
Current Period Charges			43
Cash Payments			(43)
Non-Cash Charges			0
Accrued, Ending Balance	0		0
Total Costs Accrued to Date	$ 43		$ 43