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Organization and Summary of Accounting Policies - Schedule of Revenues by Service Type (Details) - Revenue Source - Revenue
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Revenue from External Customer [Line Items]        
Revenue by service type as a proportion of total revenues (as a percent) 100.00% 100.00% 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) 98.70% 98.70% 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) 95.90% 95.50% 95.80% 95.50%
Ancillary Services        
Revenue from External Customer [Line Items]        
Revenue by service type as a proportion of total revenues (as a percent) 2.80% 3.20% 2.80% 3.20%
Other service revenues        
Revenue from External Customer [Line Items]        
Revenue by service type as a proportion of total revenues (as a percent) 1.30% 1.30% 1.40% 1.30%