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Note 5 - Supplemental Balance Sheet Information - Summary of Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2025 USD ($)
Balance	$ 45,006
Effect of foreign currency translation	400
Balance	45,406
Battery & Energy Products Segment [Member]
Balance	33,513
Effect of foreign currency translation	400
Balance	33,913
Communications Systems Segment [Member]
Balance	11,493
Effect of foreign currency translation	0
Balance	$ 11,493

X

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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