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Note 13 - Business Segment Information (Details narrative) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Foreign |  |
Long-lived assets held outside the U.S. | $ 4,748 | $ 5,153
Battery & Energy Products Revenue | 28,200 | 26,100
Communications Systems Revenue | 1,500 | 1,000
United States |  |
Battery & Energy Products Revenue | 37,100 | 30,700
Communications Systems Revenue | $ 9,600 | $ 8,700

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- References No definition available. + Details
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- References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9038-108599 + Details
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- Details
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Balance Type: |
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- Details
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