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Note 11 - Business Segment Information - Revenue by Business Segment Sector (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenues	$ 50,746	$ 41,927
UNITED STATES
Revenues	$ 39,469	$ 24,461
Revenue, percentage	78.00%	58.00%
Non-US [Member]
Revenues	$ 11,277	$ 17,466
Revenue, percentage	22.00%	42.00%
Commercial [Member]
Revenues	$ 29,659	$ 24,140
Revenue, percentage	58.00%	58.00%
Government & Defense [Member]
Revenues	$ 21,087	$ 17,787
Revenue, percentage	42.00%	42.00%
Battery & Energy Products Segment [Member]
Revenues	$ 46,321	$ 34,989
Battery & Energy Products Segment [Member] | UNITED STATES
Revenues	35,182	19,603
Battery & Energy Products Segment [Member] | Non-US [Member]
Revenues	11,139	15,386
Battery & Energy Products Segment [Member] | Commercial [Member]
Revenues	29,659	24,140
Battery & Energy Products Segment [Member] | Government & Defense [Member]
Revenues	16,662	10,849
Communications Systems Segment [Member]
Revenues	4,425	6,938
Communications Systems Segment [Member] | UNITED STATES
Revenues	4,287	4,858
Communications Systems Segment [Member] | Non-US [Member]
Revenues	138	2,080
Communications Systems Segment [Member] | Commercial [Member]
Revenues	$ 4,425	0
Communications Systems Segment [Member] | Government & Defense [Member]
Revenues		$ 6,938

X

- Definition

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+ References

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