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Summary of Unaudited Pro Forma Financial Information (Details) - World of Medicine GmbH - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 29, 2017 | Sep. 29, 2017
Business Acquisition [Line Items] |  |
Revenue | $ 146,296 | $ 415,134
Consolidated net income | $ 12,547 | $ 56,754
Earnings per share attributable to Novanta Inc. – Basic | $ 0.12 | $ 1.26
Earnings per share attributable to Novanta Inc. – Diluted | $ 0.12 | $ 1.25

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