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Note 10 - Business Segment Information (Details narrative) (Foreign, USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Foreign |  |
Long-lived assets | $ 5,153us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = ulbi_ForeignMember | $ 4,749us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = ulbi_ForeignMember

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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=6534315&loc=d3e9038-108599 + Details
Name: | us-gaap_NoncurrentAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant