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Note 8 - Shareholders' Equity (Details) (USD $)	3 Months Ended
	Mar. 29, 2015	Mar. 30, 2014
Stock compensation expense	$ 144,000us-gaap_ShareBasedCompensation	$ 229,000us-gaap_ShareBasedCompensation
Stock Options
Stock compensation expense	120,000us-gaap_ShareBasedCompensation / ULBI_ComponentOfShareBasedCompensationAxis = ULBI_OptionsMember	123,000us-gaap_ShareBasedCompensation / ULBI_ComponentOfShareBasedCompensationAxis = ULBI_OptionsMember
Employee Restricted Stock
Stock compensation expense	24,000us-gaap_ShareBasedCompensation / ULBI_ComponentOfShareBasedCompensationAxis = ULBI_EmpeeRestrictedStockMember	0us-gaap_ShareBasedCompensation / ULBI_ComponentOfShareBasedCompensationAxis = ULBI_EmpeeRestrictedStockMember
CEO Restricted Stock expense
Stock compensation expense	0us-gaap_ShareBasedCompensation / ULBI_ComponentOfShareBasedCompensationAxis = ULBI_CeoRestrictedMember	49,000us-gaap_ShareBasedCompensation / ULBI_ComponentOfShareBasedCompensationAxis = ULBI_CeoRestrictedMember
Board of Directors Stock Grant
Stock compensation expense	$ 0us-gaap_ShareBasedCompensation / ULBI_ComponentOfShareBasedCompensationAxis = ULBI_BoardMember	$ 57,000us-gaap_ShareBasedCompensation / ULBI_ComponentOfShareBasedCompensationAxis = ULBI_BoardMember

X

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

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- Details

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