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Business Combinations - Intangible Assets (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Nov. 21, 2019 | Dec. 31, 2019
Developed Technology |  |
Business Combinations |  |
Useful life/amortization period |  | 11 years 4 months 24 days
Customer Relationships |  |
Business Combinations |  |
Useful life/amortization period |  | 5 years
Avedro |  |
Business Combinations |  |
Intangible assets subject to amortization |  | $ 266,300
Total intangible assets | $ 385,200 | 385,200
Avedro | In-Process Research and Development (IPR&D) |  |
Business Combinations |  |
Intangible assets not subject to amortization |  | 118,900
Avedro | Developed Technology |  |
Business Combinations |  |
Intangible assets subject to amortization |  | $ 252,200
Useful life/amortization period | 11 years | 11 years 4 months 24 days
Avedro | Customer Relationships |  |
Business Combinations |  |
Intangible assets subject to amortization |  | $ 14,100
Useful life/amortization period | 5 years | 5 years

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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472 + Details
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