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Note 4 - Operating Leases - Rent Expense (Details Narrative) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Note 4 - Operating Leases - Rent Expense Details Narrative
Rent expense	$ 775us-gaap_OperatingLeasesRentExpenseNet	$ 1,029us-gaap_OperatingLeasesRentExpenseNet

X

- Details

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Namespace Prefix:	ulbi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	duration