Note 12 - Fire at Manufacturing Facility (Details Narrative) - USD ($)	1 Months Ended	3 Months Ended
Apr. 30, 2013	Jun. 30, 2011	Sep. 27, 2015
Note 14 - Fire At Manufacturing Facility Details Narrative
Business Interruption Loss, Gross		$ 1,589,000
Proceeds from Insurance Settlement, Operating Activities	$ 1,286,000
Gain on Business Interruption Insurance Recovery	$ 0
Insurance Settlements Receivable			$ 177,000
Business Interruption, Insurance Deductible			$ 130,000

Business Interruption, Insurance Deductible

No definition available.

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- Definition

Business Interruption Loss, Gross

+ References

No definition available.

+ Details

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Namespace Prefix:	ULBI_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

Name:	ULBI_Note14FireAtManufacturingFacilityDetailsNarrativeAbstract
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- Definition

The net amount (to the extent disclosed within this portion of the income statement) by which an insurance settlement exceeds incremental costs incurred from the event causing an interruption of business, plus the insurance award for earnings lost from the event, such as a natural catastrophe, explosion or fire.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6365675&loc=d3e16285-107787

+ Details

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- Definition

Amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy.

+ References

No definition available.

+ Details

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

- Definition

The cash inflow from the amounts received by the insured under the terms of an insurance contract settlement. This element pertains only to insurance proceeds related to operating activities. It excludes insurance settlements classified as investing cash flows, for example, insurance settlements related to fixed assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 16

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3337-108585

+ Details

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