Revenue Recognition - Deferred Revenue (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Total deferred revenue - short term	$ 96,783	$ 84,494	$ 98,808
Total deferred revenue - long term	393	174	$ 54
Hosted Services - Business
Disaggregation of Revenue [Line Items]
Total deferred revenue - short term	96,022	83,561
Total deferred revenue - long term	111	0
Professional Services
Disaggregation of Revenue [Line Items]
Total deferred revenue - short term	761	933
Total deferred revenue - long term	$ 282	$ 174