Note 3 - Other Balance Sheet Data (Details) - Other Balance Sheet Data (USD $) In Thousands, unless otherwise specified	Mar. 01, 2015	Mar. 02, 2014
Inventories:
Raw materials	$ 7,376	$ 7,253
Work-in-process	3,114	3,097
Finished goods	3,605	3,223
Manufacturing supplies	344	298
	14,439us-gaap_InventoryNet	13,871us-gaap_InventoryNet
Property, plant and equipment:
Property, plant and equipment, gross	172,604us-gaap_PropertyPlantAndEquipmentGross	172,824us-gaap_PropertyPlantAndEquipmentGross
Less accumulated depreciation and amortization	146,067	143,150
	26,537us-gaap_PropertyPlantAndEquipmentNet	29,674us-gaap_PropertyPlantAndEquipmentNet
Goodwill and other intangible assets:
Goodwill	9,776us-gaap_Goodwill	9,776us-gaap_Goodwill
Other intangibles	64	71
	9,840	9,847
Accrued liabilities:
Payroll and payroll related	2,117us-gaap_AccruedSalariesCurrent	1,910us-gaap_AccruedSalariesCurrent
Employee benefits	262us-gaap_AccruedEmployeeBenefitsCurrent	274us-gaap_AccruedEmployeeBenefitsCurrent
Workers' compensation	300	354
Professional fees	671us-gaap_AccruedProfessionalFeesCurrent	1,116us-gaap_AccruedProfessionalFeesCurrent
Restructuring (Note 9)	182us-gaap_RestructuringReserveCurrent	198us-gaap_RestructuringReserveCurrent
Other	1,235us-gaap_OtherAccruedLiabilitiesCurrent	1,287us-gaap_OtherAccruedLiabilitiesCurrent
	4,767us-gaap_AccruedLiabilitiesCurrent	5,139us-gaap_AccruedLiabilitiesCurrent
Land, Buildings and Improvements [Member]
Property, plant and equipment:
Property, plant and equipment, gross	42,019	42,471
Machinery, Equipment, Furniture and Fixtures [Member]
Property, plant and equipment:
Property, plant and equipment, gross	$ 130,585	$ 130,353

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