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Note 11 - Business Segment Information - Revenue by Business Segment Sector (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Revenues | $ 48,561 | $ 42,983 | $ 99,307 | $ 84,910
UNITED STATES |  |  |  |
Revenues | $ 35,364 | $ 23,399 | $ 74,833 | $ 47,860
Revenue, percentage | 73.00% | 54.00% | 75.00% | 56.00%
Non-US [Member] |  |  |  |
Revenues | $ 13,197 | $ 19,584 | $ 24,474 | $ 37,050
Revenue, percentage | 27.00% | 46.00% | 25.00% | 44.00%
Commercial [Member] |  |  |  |
Revenues | $ 31,333 | $ 27,664 | $ 60,992 | $ 51,804
Revenue, percentage | 65.00% | 64.00% | 61.00% | 61.00%
Government & Defense [Member] |  |  |  |
Revenues | $ 17,228 | $ 15,319 | $ 38,315 | $ 33,106
Revenue, percentage | 35.00% | 36.00% | 39.00% | 39.00%
Battery & Energy Products Segment [Member] |  |  |  |
Revenues | $ 45,867 | $ 36,683 | $ 92,188 | $ 71,672
Battery & Energy Products Segment [Member] | UNITED STATES |  |  |  |
Revenues | 33,300 | 19,412 | 68,482 | 39,015
Battery & Energy Products Segment [Member] | Non-US [Member] |  |  |  |
Revenues | 12,567 | 17,271 | 23,706 | 32,657
Battery & Energy Products Segment [Member] | Commercial [Member] |  |  |  |
Revenues | 31,333 | 27,664 | 60,992 | 51,804
Battery & Energy Products Segment [Member] | Government & Defense [Member] |  |  |  |
Revenues | 14,534 | 9,019 | 31,196 | 19,868
Communications Systems Segment [Member] |  |  |  |
Revenues | 2,694 | 6,300 | 7,119 | 13,238
Communications Systems Segment [Member] | UNITED STATES |  |  |  |
Revenues | 2,064 | 3,987 | 6,351 | 8,845
Communications Systems Segment [Member] | Non-US [Member] |  |  |  |
Revenues | 630 | 2,313 | 768 | 4,393
Communications Systems Segment [Member] | Commercial [Member] |  |  |  |
Revenues | 0 | 0 | 0 | 0
Communications Systems Segment [Member] | Government & Defense [Member] |  |  |  |
Revenues | $ 2,694 | $ 6,300 | $ 7,119 | $ 13,238

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