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Organization and Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
 6 Months Ended 12 Months Ended
Dec. 31, 2020
Dec. 31, 2022
Dec. 31, 2021
Jun. 30, 2020
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]        
Restricted cash $ 0 $ 9,500,000 $ 1,400,000 $ 0
Restricted cash, current   2,000,000 1,000,000  
Restricted cash, non current   $ 7,500,000 400,000  
Lease extension term   10 years    
Unamortized software costs   $ 7,100,000 6,700,000  
Amortization expense for capitalized software   1,200,000 200,000  
Advance Medicare payments to provide relief from economic impacts of COVID-19       29,700,000
Revenue increase (decrease) due to changes in estimated transaction price due to contractual adjustments   22,100,000 15,900,000 (9,900,000)
Revenue recognized due to expanded local coverage determination for which revenue was previously constrained     6,800,000  
Accrued liability for Medicare refund   23,600,000 19,300,000  
Reduced revenues (299,800,000) (678,400,000) (690,600,000) (638,600,000)
Capitalized costs incurred to obtain or fulfill contract   0    
Net gain on divestiture $ 0 $ 0 $ 162,000,000.0 1,000,000.0
Provider fund relief under CARES Act       $ 14,600,000
Minimum        
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]        
Remaining lease terms   1 year    
Maximum        
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]        
Remaining lease terms   15 years    
Immaterial Prior Period Medicare Claims        
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]        
Change in earnings (loss) per share (in dollars per share)       $ (0.05)
Accrued liability for Medicare refund       $ 4,700,000
Reduced revenues       $ 4,700,000
Performance Obligation Estimate        
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]        
Change in earnings (loss) per share (in dollars per share)   $ 0.21 $ 0.15 $ (0.10)
Equipment | Minimum        
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]        
Estimated useful lives (in years)   5 years    
Equipment | Maximum        
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]        
Estimated useful lives (in years)   7 years    
Leasehold improvements | Minimum        
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]        
Estimated useful lives (in years)   1 year    
Leasehold improvements | Maximum        
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]        
Estimated useful lives (in years)   15 years    
Government Contracts Concentration Risk | Medicare | Revenue        
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]        
Concentration risk (in percent) 16.00% 14.00% 17.00% 15.00%