Summary of Significant Accounting Policies - Summary of Revenue (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Line Items]
Revenue		$ 745,424	$ 550,700	$ 388,224
Prescription Transactions Revenue
Accounting Policies [Line Items]
Revenue		593,359	488,257	364,582
Subscription Revenue
Accounting Policies [Line Items]
Revenue	[1]	59,925	29,386	13,085
Other Revenue
Accounting Policies [Line Items]
Revenue		$ 92,140	$ 33,057	$ 10,557

[1] Represents revenue from the Company's Gold and Kroger Savings subscription offerings (defined below). Subscription revenue is disclosed separately from other revenue beginning in the year ended December 31, 2021. Prior period amounts have been recast to conform with the current period presentation.