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Note 5 - Property, Equipment and Improvements - Major Classes of Property, Equipment and Improvements (Details) - USD ($) $ in Thousands	Apr. 01, 2018	Dec. 31, 2017
Property, equipment and improvements	$ 67,064	$ 66,711
Less: Accumulated Depreciation	(59,705)	(59,141)
Property, Equipment and Improvements, Net	7,359	7,570
Land [Member]
Property, equipment and improvements	123	123
Building and Building Improvements [Member]
Property, equipment and improvements	7,900	7,858
Machinery and Equipment [Member]
Property, equipment and improvements	51,116	50,852
Furniture and Fixtures [Member]
Property, equipment and improvements	2,024	2,005
Computer Equipment [Member]
Property, equipment and improvements	5,414	5,338
Construction in Progress [Member]
Property, equipment and improvements	$ 487	$ 535

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.14)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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X

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+ References

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-Name Accounting Standards Codification
-Topic 944
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