Fixed Assets - Major Classes of Fixed Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property Plant And Equipment [Line Items]
Fixed assets, gross	$ 133,509	$ 135,097
Less: Accumulated depreciation	(46,786)	(51,633)
Fixed assets, net	86,723	83,464
Medical Lab Equipment
Property Plant And Equipment [Line Items]
Fixed assets, gross	$ 48,493	56,025
Medical Lab Equipment | Minimum
Property Plant And Equipment [Line Items]
Useful life in years	5 months
Medical Lab Equipment | Maximum
Property Plant And Equipment [Line Items]
Useful life in years	12 years
Leasehold Improvements
Property Plant And Equipment [Line Items]
Fixed assets, gross	$ 10,090	11,222
Useful life in years	us-gaap:UsefulLifeShorterOfTermOfLeaseOrAssetUtilityMember
Building
Property Plant And Equipment [Line Items]
Fixed assets, gross	$ 9,781	9,781
Useful life in years	39 years
Computer Software
Property Plant And Equipment [Line Items]
Fixed assets, gross	$ 8,017	7,982
Computer Software | Minimum
Property Plant And Equipment [Line Items]
Useful life in years	1 year
Computer Software | Maximum
Property Plant And Equipment [Line Items]
Useful life in years	5 years
Building Improvements
Property Plant And Equipment [Line Items]
Fixed assets, gross	$ 7,741	7,748
Building Improvements | Minimum
Property Plant And Equipment [Line Items]
Useful life in years	6 months
Building Improvements | Maximum
Property Plant And Equipment [Line Items]
Useful life in years	39 years
Computer Hardware
Property Plant And Equipment [Line Items]
Fixed assets, gross	$ 6,780	6,805
Computer Hardware | Minimum
Property Plant And Equipment [Line Items]
Useful life in years	1 year
Computer Hardware | Maximum
Property Plant And Equipment [Line Items]
Useful life in years	5 years
Aircraft
Property Plant And Equipment [Line Items]
Fixed assets, gross	$ 6,400	6,400
Useful life in years	7 years
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Fixed assets, gross	$ 3,615	3,860
Furniture and Fixtures | Minimum
Property Plant And Equipment [Line Items]
Useful life in years	1 year
Furniture and Fixtures | Maximum
Property Plant And Equipment [Line Items]
Useful life in years	5 years
Land Improvements
Property Plant And Equipment [Line Items]
Fixed assets, gross	$ 904	904
Land Improvements | Minimum
Property Plant And Equipment [Line Items]
Useful life in years	5 years
Land Improvements | Maximum
Property Plant And Equipment [Line Items]
Useful life in years	15 years
Automobile
Property Plant And Equipment [Line Items]
Fixed assets, gross	$ 445	445
Automobile | Minimum
Property Plant And Equipment [Line Items]
Useful life in years	3 years
Automobile | Maximum
Property Plant And Equipment [Line Items]
Useful life in years	7 years
General Equipment
Property Plant And Equipment [Line Items]
Fixed assets, gross	$ 109	115
Useful life in years	5 years
Land
Property Plant And Equipment [Line Items]
Fixed assets, gross	$ 8,800	8,800
Assets Not Yet Placed in Service
Property Plant And Equipment [Line Items]
Fixed assets, gross	$ 22,334	$ 15,010