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Note 2 - Dispositions and Exit Activities (Detail) - Discontinued Operations (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Net sales	$ 21,019	$ 27,501
Provision (Benefit) for income taxes	98	102
Income (Loss) from discontinued operations, net of tax	264	(71)
Ultralife Batteries UK, Ltd. [Member]
Income (Loss) from discontinued operations	241
Income (Loss) from discontinued operations, net of tax	241
RedBlack Communications Inc [Member]
Net sales		1,186
Income (Loss) from discontinued operations	7	(12)
Provision (Benefit) for income taxes		11
Income (Loss) from discontinued operations, net of tax	7	(23)
Energy Services Business [Member]
Income (Loss) from discontinued operations	16	(48)
Income (Loss) from discontinued operations, net of tax	$ 16	$ (48)

X

- Definition

Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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