Note 14 - Customer and Supplier Concentrations (Details Textual) - Customer Concentration Risk [Member] - Sales Revenue, Net [Member]	12 Months Ended
Feb. 25, 2018	Feb. 26, 2017	Feb. 28, 2016
TTM Technologies Inc. [Member]
Concentration Risk, Percentage	14.90%	16.20%	13.80%
General Electric [Member]
Concentration Risk, Percentage	11.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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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
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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