Revenue - Summary of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Net revenues	$ 158,654	$ 196,902	$ 429,247	$ 401,081
Commission
Disaggregation of Revenue [Line Items]
Net revenues	118,038	147,508	327,677	321,489
Ancillary
Disaggregation of Revenue [Line Items]
Net revenues	1,189	891	2,000	1,999
Small Group
Disaggregation of Revenue [Line Items]
Net revenues	1	66	5	72
Enterprise
Disaggregation of Revenue [Line Items]
Net revenues	40,616	49,394	101,570	79,592
Partner Marketing and Enrollment Services
Disaggregation of Revenue [Line Items]
Net revenues	23,797	42,531	64,460	64,388
Direct Partner Campaigns
Disaggregation of Revenue [Line Items]
Net revenues	14,366	6,700	34,482	14,802
Other
Disaggregation of Revenue [Line Items]
Net revenues	2,453	163	2,628	402
Medicare
Disaggregation of Revenue [Line Items]
Net revenues	116,563	145,316	324,763	314,801
Medicare | Medicare Advantage
Disaggregation of Revenue [Line Items]
Net revenues	115,494	144,039	322,128	312,187
Medicare | Medicare Supplement
Disaggregation of Revenue [Line Items]
Net revenues	91	789	403	1,573
Medicare | Prescription Drug Plans
Disaggregation of Revenue [Line Items]
Net revenues	978	488	2,232	1,041
Individual and Family Plan
Disaggregation of Revenue [Line Items]
Net revenues	285	1,235	909	4,617
Individual and Family Plan | Fixed Indemnity
Disaggregation of Revenue [Line Items]
Net revenues	175	808	556	3,589
Individual and Family Plan | Short-term
Disaggregation of Revenue [Line Items]
Net revenues	110	219	281	619
Individual and Family Plan | Major Medical
Disaggregation of Revenue [Line Items]
Net revenues	$ 0	$ 208	$ 72	$ 409