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Acquisitions Pro Forma Financial Results (Details) - Paragon Medical Inc - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2018 | Jun. 30, 2018
Business Acquisition [Line Items] |  |
Pro forma net sales | $ 210,902 | $ 420,731
Pro forma net loss | $ (12,017) | $ (20,078)
Basic net loss per share (in dollars per share) | $ (0.43) | $ (0.73)
Diluted net loss per share (in dollars per share) | $ (0.43) | $ (0.73)

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