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Note 13 - Segment Information - Identifiable Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Identifiable Assets | $ 132,857 | $ 110,066
Corporate, Non-Segment [Member] |  |
Identifiable Assets | 29,428 | 4,017
Electronic Test [Member] | Operating Segments [Member] |  |
Identifiable Assets | 30,245 | 31,143
Environmental Technologies [Member] | Operating Segments [Member] |  |
Identifiable Assets | 18,080 | 18,040
Process Technologies [Member] | Operating Segments [Member] |  |
Identifiable Assets | $ 55,104 | $ 56,866

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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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