No definition available.

Name:	ULBI_Note2ShareRepurchaseProgramDetailsNarrativeAbstract
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- References

No definition available.

+ Details

Name:	ULBI_StockRepurchasePlanAdditionalSharesAuthorizedToBeRepurchased
Namespace Prefix:	ULBI_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	ULBI_StockRepurchasePlanSharesAuthorizedToBeRepurchased
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Data Type:	xbrli:sharesItemType
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Period Type:	duration

- Definition

The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30, 31

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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Note 2 - Share Repurchase Program (Details Narrative) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended		18 Months Ended	24 Months Ended
	Sep. 27, 2015	Sep. 27, 2015	Jun. 02, 2016	Apr. 30, 2016	Oct. 28, 2015	Apr. 30, 2016
Note 2 - Share Repurchase Program Details Narrative
Maximum number of shares the Company is authorized to repurchase				1,800,000		1,800,000
Additional number of shares the Company is authorized to repurchase			1,600,000
Shares repurchased	748,582	2,225,437			2,442,191
Cost of shares repurchased	$ 3,357,000	$ 9,162,000			$ 9,877,000
Balance - shares authorized to be repurchased					957,809