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Note 17 - Segment Information - Identifiable Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Identifiable Assets | $ 134,829 | $ 110,066
Capital expenditures | 1,291 | 1,365
Electronic Test [Member] |  |
Identifiable Assets | 32,505 | 31,143
Capital expenditures | 599 | 80
Environmental Technologies [Member] |  |
Identifiable Assets | 16,772 | 18,040
Capital expenditures | 495 | 368
Process Technologies [Member] |  |
Identifiable Assets | 56,842 | 56,866
Capital expenditures | 170 | 543
Corporate Segment [Member] |  |
Identifiable Assets | 28,710 | 4,017
Capital expenditures | $ 27 | $ 374

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. 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