Business (Details) $ / shares in Units, $ in Thousands		12 Months Ended
	Sep. 20, 2023 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) practice state $ / shares shares	Dec. 31, 2023 USD ($) shares
Business Acquisition [Line Items]
Number of oncology practices | practice		37
Number of states in which entity operates | state		20
Reverse recapitalization, equity conversion ratio		1
Number of securities called by each warrant (in shares)		1
Transaction expenses | $	$ 13,000	$ 1,338	$ 31,236
Sponsor Earnout Shares
Business Acquisition [Line Items]
Earnout period (in years)	5 years
Percentage of stock subject to vesting (in percent)	0.35
Number of shares subject to vesting (in shares)	2,839,375
Stock price trigger (in usd per share) | $ / shares	$ 13.50
Earnout period, trading days (in days)	20 days
Earnout period, threshold trading day period (in days)	30 days
Earnout period, number of months after closing (in months)	60 months
AON LLC
Business Acquisition [Line Items]
Reverse recapitalization costs | $		1,300	$ 31,900
Transaction expenses | $		31,100
AON LLC | Temporary Equity
Business Acquisition [Line Items]
Adjustment to APIC, transaction costs | $		$ 800
Class A Common Stock
Business Acquisition [Line Items]
Issuance of Class A Common Stock (in shares)	1,047,343
Common stock, shares outstanding (in shares)		30,192,847	9,517,816
Series A Preferred Stock
Business Acquisition [Line Items]
Stock price (in usd per share) | $ / shares		$ 10.00
Class B Common Stock
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)		14,867,850	25,109,551
Legacy AON Stockholders | Class B Prefunded Warrants
Business Acquisition [Line Items]
Class of warrant outstanding (in warrants)	3,000,245
Legacy AON Stockholders | AON LLC
Business Acquisition [Line Items]
Common unit, units outstanding (in units)	28,109,796
Legacy AON Stockholders | Class B Common Stock
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)	25,109,551
AON Inc. | AON LLC
Business Acquisition [Line Items]
Common unit, units outstanding (in units)	9,532,354
AON Inc. | AON LLC | Series A Preferred Stock
Business Acquisition [Line Items]
Preferred units, outstanding (in units)	6,651,610
Digital Transformation Opportunities Corp. (“DTOC”) | Class B Common Stock
Business Acquisition [Line Items]
Reverse recapitalization, equity conversion ratio	1
DTOC Unredeemed Shareholders | Class A Common Stock
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)	147,511
DTOC Sponsor | Private Placement Warrants
Business Acquisition [Line Items]
Class of warrant outstanding (in warrants)	6,113,333
DTOC Sponsor | Public Warrant
Business Acquisition [Line Items]
Class of warrant outstanding (in warrants)	8,337,500
Warrant, exercise period, after initial public offering	12 months
Warrant, exercise period, after business combination	30 days
Warrant, term	5 years
DTOC Sponsor | Class A Common Stock
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)	5,498,125
Earnout shares not outstanding (in shares)	2,839,375
Stock price (in usd per share) | $ / shares	$ 11.50
DTOC Sponsor | Class A Common Stock | Public Warrant
Business Acquisition [Line Items]
Number of securities called by each warrant (in shares)	1
AEA Growth Management LP | Series A Preferred Stock
Business Acquisition [Line Items]
Issuance of Class A Common Stock (in shares)	6,651,610
Common stock, shares outstanding (in shares)	6,651,610
AON LLC
Business Acquisition [Line Items]
Reverse recapitalization, equity conversion ratio	1
AON LLC | Class B Prefunded Warrants
Business Acquisition [Line Items]
Class of warrant outstanding (in warrants)	3,000,245
AON LLC | Class A Common Stock
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)	1,047,343
AON LLC | Class B Common Stock
Business Acquisition [Line Items]
Stock price (in usd per share) | $ / shares	$ 0.01
AON LLC | Class B Common Stock | Class B Prefunded Warrants
Business Acquisition [Line Items]
Number of securities called by each warrant (in shares)	1