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Organization and Summary of Accounting Policies - Revenues by Sources (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 717.4 | $ 666.2
Patent service revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 705.3 | $ 656.4
Patent service revenues | Customer | Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue by service type as a proportion of total revenues (percent) | 100.00% | 100.00%
Private insurance |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 361.0 | $ 335.6
Private insurance | Customer | Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue by service type as a proportion of total revenues (percent) | 51.20% | 51.10%
Government |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 303.6 | $ 287.8
Government | Customer | Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue by service type as a proportion of total revenues (percent) | 43.00% | 43.80%
Self-pay |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 19.8 | $ 15.6
Self-pay | Customer | Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue by service type as a proportion of total revenues (percent) | 2.80% | 2.40%
Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 20.9 | $ 17.4
Other | Customer | Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue by service type as a proportion of total revenues (percent) | 3.00% | 2.70%
Other service revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 12.1 | $ 9.8

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