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