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Commitment and Contingencies - Narratives (Details) - Cryobiological storage - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2018
Contingencies |  |
Warranty accrual | $ 3.8 | $ 3.8
Operating Segments | D&S West |  |
Contingencies |  |
Warranty accrual | $ 3.8 | $ 3.8

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