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ACQUISITIONS - CAS Medical Systems, Inc. (Narrative) (Details) - CAS Medical Systems, Inc. - USD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended
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Apr. 18, 2019 | Feb. 11, 2019 | Dec. 31, 2019
Business Acquisition [Line Items] |  |  |
Consideration per share to be transferred (in dollars per share) |  | $ 2.45 |
Acquisition price, subject uncertain adjustments |  | $ 100.0 |
Cash purchase price | $ 100.8 |  |
Acquisition-related costs |  |  | $ 2.0
Developed technology |  |  |
Business Acquisition [Line Items] |  |  |
Weighted average useful life | 14 years |  |
Customer Relationships |  |  |
Business Acquisition [Line Items] |  |  |
Weighted average useful life | 10 years |  |

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