Revenue Recognition - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) Segment Program Obligation	Dec. 31, 2020 USD ($) Segment	Dec. 31, 2019 USD ($)
Disaggregation Of Revenue [Line Items]
Deferred revenue	$ 3,371	$ 4,460
Increase to deferred revenue	$ (1,089)	$ 686	$ (1,198)
Number of reportable segments | Segment	1	1
Continuing Operations
Disaggregation Of Revenue [Line Items]
Number of programs | Program	3
Number of performance obligations | Obligation	1
Deferred revenue	$ 3,400	$ 4,500
Revenue recognized	4,400
Increase to deferred revenue	3,300
Revenue recognized from performance obligations satisfied in prior period	$ 100
Period of billing in arrears once timing of services to customers is known	1 month
Number of days for customer to make payment after being invoiced	30 days
Capitalized costs	$ 300	800
Capitalized costs, amortization expense	$ 700	$ 400	$ 100
Number of reportable segments | Segment	1
Continuing Operations | SilverSneakers
Disaggregation Of Revenue [Line Items]
Revenues from PMPM fees percentage	47.00%	54.00%