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Note 5 Goodwill, Intangible Assets and Long Term Assets Goodwill Activity (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2014	Dec. 31, 2013	Jun. 30, 2013
Goodwill beginning	$ 16,419	$ 16,357	$ 16,344
Goodwill Translation Adjustments	(16)	62	13
Goodwill ending	16,403	16,419	16,357
Battery and Energy Products
Goodwill beginning	4,926	4,864	4,851
Goodwill Translation Adjustments	(16)	62	13
Goodwill ending	4,910	4,926	4,864
Communications Systems
Goodwill beginning	11,493	11,493	11,493
Goodwill Translation Adjustments	0	0	0
Goodwill ending	$ 11,493	$ 11,493	$ 11,493

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillTranslationAdjustments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration