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Organization and Summary of Accounting Policies - Schedule of Revenues by Service Type (Details) - Revenue Source - Revenue | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Revenue from External Customer [Line Items] |  |
Revenue by service type as a proportion of total revenues (as a percent) | 100.00% | 100.00%
Patent service revenues |  |
Revenue from External Customer [Line Items] |  |
Revenue by service type as a proportion of total revenues (as a percent) | 98.60% | 98.70%
Surgical Facility Services |  |
Revenue from External Customer [Line Items] |  |
Revenue by service type as a proportion of total revenues (as a percent) | 95.70% | 95.50%
Ancillary Services |  |
Revenue from External Customer [Line Items] |  |
Revenue by service type as a proportion of total revenues (as a percent) | 2.90% | 3.20%
Other service revenues |  |
Revenue from External Customer [Line Items] |  |
Revenue by service type as a proportion of total revenues (as a percent) | 1.40% | 1.30%

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