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Commitment and Contingencies - Narratives (Details) - Cryobiological storage - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Jun. 30, 2018 | Sep. 30, 2018
Contingencies |  |
Warranty accrual |  | $ 3.8
Operating Segments | D&S West |  |
Contingencies |  |
Warranty accrual | $ 3.8 |

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