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Summary of Significant Accounting Policies and Select Balance Sheet Information - Additional Information (Detail 1) - Abbott [Member] - R&D and Clinical Activities [Member] - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-01-01 $ in Millions | Sep. 30, 2019 USD ($)
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Summary Of Significant Accounting Policies [Line Items] |
Estimated revenue to be recognized in future | $ 17.1
Expected period to recognize the remaining revenue | 6 years
TRANSCEND Clinical Trial [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Revenue remaining performance obligation percentage | 75.00%
Revenue remaining performance obligation expected timing of satisfaction year | 2021
Capitalized contract cost amortization period | 4 years
Revenue remaining performance obligation amortization percentage | 25.00%

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