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Organization and Summary of Accounting Policies - Revenues by Service Type (Details) - Revenue Source - Revenue	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue from External Customer [Line Items]
Revenue by service type as a proportion of total revenues (percent)	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 (percent)	98.40%	98.50%	98.70%
Surgical Facility Services
Revenue from External Customer [Line Items]
Revenue by service type as a proportion of total revenues (percent)	96.00%	95.80%	95.70%
Ancillary services revenues
Revenue from External Customer [Line Items]
Revenue by service type as a proportion of total revenues (percent)	2.40%	2.70%	3.00%
Other service revenues
Revenue from External Customer [Line Items]
Revenue by service type as a proportion of total revenues (percent)	1.60%	1.50%	1.30%

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