Summary of Significant Accounting Policies - Net Revenue Disaggregated by Sales Channel and Geographic Region (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Total net revenue	$ 247,767	$ 185,704	$ 114,451
Direct
Disaggregation Of Revenue [Line Items]
Total net revenue	235,817	164,218	111,358
Wholesale
Disaggregation Of Revenue [Line Items]
Total net revenue	11,528	20,150	1,408
Managed PaaS
Disaggregation Of Revenue [Line Items]
Total net revenue	422	1,336	1,685
North America
Disaggregation Of Revenue [Line Items]
Total net revenue	244,017	185,648	114,261
North America | Direct
Disaggregation Of Revenue [Line Items]
Total net revenue	232,067	164,162	111,168
North America | Wholesale
Disaggregation Of Revenue [Line Items]
Total net revenue	11,528	20,150	1,408
North America | Managed PaaS
Disaggregation Of Revenue [Line Items]
Total net revenue	422	1,336	1,685
Other
Disaggregation Of Revenue [Line Items]
Total net revenue	3,750	56	190
Other | Direct
Disaggregation Of Revenue [Line Items]
Total net revenue	$ 3,750	$ 56	$ 190