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Loss from Fire	12 Months Ended
	Dec. 31, 2025
Unusual or Infrequent Items, or Both [Abstract]
Loss from Fire	Loss (Recovery) from FireOn June 7, 2022, the Company’s primary contract manufacturer experienced a fire at its plant in Indonesia, destroying a significant amount of Cognex inventories. In 2023, the Company recorded recoveries related to the fire of $8,000,000, consisting of $2,500,000 for proceeds received from the Company's insurance carrier in relation to a business interruption claim and $5,500,000 for proceeds received as part of a financial settlement for lost inventory and other losses incurred as a result of the fire.

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