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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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