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Note 4 - Acquisition - Unaudited Pro Forma Financial Information (Details) - Honeywell International, Inc. [Member] - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Net sales | $ 131,602 |  | $ 90,255 | $ 257,947 | $ 184,885
Net income | $ 6,154 | [1] | $ 3,081 | $ 20,103 | $ 5,581
Diluted earnings per share (in dollars per share) | $ 0.83 |  | $ 0.42 | $ 2.72 | $ 0.76
[1] | The Acquisition-related costs mentioned above are excluded from the unaudited pro forma net income.

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