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Organization and Summary of Accounting Policies - Schedule of Revenues by Service Type (Details) - Revenue Source - Revenue | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Revenue from External Customer [Line Items] |  |  |  |
Service revenues as a percentage of total revenues | 100.00% | 100.00% | 100.00% | 100.00%
Patent service revenues |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Service revenues as a percentage of total revenues | 98.60% | 98.80% | 98.60% | 98.60%
Surgical Facility Services |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Service revenues as a percentage of total revenues | 95.60% | 95.40% | 95.50% | 95.00%
Ancillary Services |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Service revenues as a percentage of total revenues | 3.00% | 3.40% | 3.10% | 3.60%
Other service revenues |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Service revenues as a percentage of total revenues | 1.40% | 1.20% | 1.40% | 1.40%

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