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Acquisitions - Narrative (Details) - USD ($) $ in Millions |  |  |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 28, 2019 | Dec. 14, 2018 | Nov. 13, 2018 | May 23, 2018 | Feb. 14, 2018 | Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Vascular Insights |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Purchase consideration, upfront payment |  | $ 40.0 |  |  |  |  |  |
Contingent liability |  | $ 20.0 |  |  |  |  |  |
Net sales related to acquisition |  |  |  |  |  | $ 1.5 |  |
Weighted average useful life |  | 11 years 9 months 18 days |  |  |  |  |  |
Vascular Insights | Developed technology |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Useful life |  | 12 years |  |  |  |  |  |
Vascular Insights | Trademarks |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Useful life |  | 9 years |  |  |  |  |  |
Vascular Insights | Customer Lists |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Useful life |  | 8 years |  |  |  |  |  |
Cianna Medical |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Purchase consideration, upfront payment |  |  | $ 135.0 |  |  |  |  |
Net sales related to acquisition |  |  |  |  |  | 12.8 |  |
Weighted average useful life |  |  | 10 years 8 months 12 days |  |  |  |  |
Working capital adjustment |  |  | $ 1.2 |  |  |  |  |
Acquisition-related costs |  |  |  |  |  |  |  | $ 3.5
Cianna Medical | Achievement of Supply Chain and Scalability Metrics |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Earn-out payments |  |  | 15.0 |  |  |  |  |
Cianna Medical | Annual Net Sales Milestone |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Earn-out payments |  |  | $ 50.0 |  |  |  |  |
Cianna Medical | Developed technology |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Useful life |  |  | 11 years |  |  |  |  |
Cianna Medical | Trademarks |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Useful life |  |  | 10 years |  |  |  |  |
Cianna Medical | Customer Lists |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Useful life |  |  | 8 years |  |  |  |  |
DirectACCESS Medical, LLC |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Weighted average useful life |  |  |  | 9 years 10 months 24 days |  |  |  |
Total purchase price |  |  |  | $ 7.3 |  |  |  |
DirectACCESS Medical, LLC | Developed technology |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Useful life |  |  |  | 10 years |  |  |  |
DirectACCESS Medical, LLC | Trademarks |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Useful life |  |  |  | 10 years |  |  |  |
DirectACCESS Medical, LLC | Customer Lists |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Useful life |  |  |  | 5 years |  |  |  |
Becton, Dickinson and Company |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Net sales related to acquisition |  |  |  |  |  | $ 11.6 | $ 6.3 |
Weighted average useful life |  |  |  |  | 8 years |  |  |
Acquisition-related costs |  |  |  |  |  |  |  | $ 1.8
Total purchase price |  |  |  |  | $ 100.3 |  |  |
Becton, Dickinson and Company | Developed technology |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Useful life |  |  |  |  | 8 years |  |  |
Becton, Dickinson and Company | Trademarks |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Useful life |  |  |  |  | 9 years |  |  |
Becton, Dickinson and Company | Customer Lists |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Useful life |  |  |  |  | 7 years |  |  |
Fluidx |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Payments to acquire shares | $ 2.0 |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  | 12.70% |  |

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