Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) institution	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract term (in years)	3 years
Contract termination, notice period, low end of range (in days)	30 days
Contract termination, notice period, high end of range (in days)	90 days
Remaining contract term related to remaining performance obligations (in years)	1 year
Accrued receivables	$ 45,800,000	$ 54,600,000
Accrued claims payable	$ 30,294,000	31,139,000
Claims payable, payment period (within)	30 days
Unbilled receivables	$ 45,100,000	42,900,000
Period in which unbilled receivables are billed to clients (within) (in days)	30 days
Contract term, clinics, low end of range (in years)	1 year
Contract term, clinics, high end of range (in years)	2 years
Contract term with specialty pharmacies (in years)	1 year
Period after month end where vendor rebates are billed (within) (in days)	20 days
Number of financial institutions where substantially all of the cash is maintained | institution	2
Goodwill and intangible asset impairment	$ 0	0	$ 0
Impairment of long-lived assets	0	0	0
Income tax penalties and interest expense	$ 0	$ 0	$ 0
Options to purchase common stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Expected dividend rate	0.00%	0.00%	0.00%
One vendor | Accounts receivable | Credit concentration risk
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk (as percent)	22.00%	30.00%
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract with customer, payment period (in days)	30 days
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract termination, notice period, high end of range (in days)	60 days