Summary of Significant Accounting Policies - Additional information (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) Segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Accounting Policies [Line Items]
Number of operating segments | Segment	1
Cash and cash equivalents	$ 47,998,000	$ 66,633,000
Sales credits and reserves	400,000	1,700,000
Accounts receivable, allowance for doubtful accounts	2,949,000	1,861,000	$ 1,435,000	$ 1,014,000
Goodwill related to acquisition	21,721,000
Goodwill, impairment loss	0	0	0
Impairment loss recorded	3,274,000	1,797,000	3,220,000
Cumulative translation adjustment	(600,000)	100,000
Accumulated deficit adjustment	$ 709,624,000	583,184,000	627,111,000	665,866,000
Percentage of cloud-hosted revenue platforms	95.00%
Advertising expenses	$ 2,300,000	1,900,000	2,200,000
Liabilities for estimated state sales taxes	$ 7,300,000	6,500,000
Cumulative Effect, Period of Adoption, Adjustment
Accounting Policies [Line Items]
Accumulated deficit adjustment				5,488,000
2021 Omnibus Incentive Plan | Option, restricted stock awards and restricted stock units
Accounting Policies [Line Items]
Share based compensation by share based award vesting term	4 years
Accumulated Deficit
Accounting Policies [Line Items]
Accumulated deficit adjustment	$ (206,218,000)	$ (187,691,000)	$ (135,398,000)	(94,204,000)
Accumulated Deficit | Cumulative Effect, Period of Adoption, Adjustment
Accounting Policies [Line Items]
Accumulated deficit adjustment				$ 5,488,000
Minimum
Accounting Policies [Line Items]
Payment terms, period	30 days
Maximum
Accounting Policies [Line Items]
Payment terms, period	60 days
Furniture and fixtures | Minimum
Accounting Policies [Line Items]
Property and equipment, useful life	5 years
Furniture and fixtures | Maximum
Accounting Policies [Line Items]
Property and equipment, useful life	7 years
Computers and equipment
Accounting Policies [Line Items]
Property and equipment, useful life	3 years
Supplier Concentration Risk | NYOCA | Cost of Goods and Service Benchmark
Accounting Policies [Line Items]
Concentration risk, percentage	12.60%	13.90%
Outside US
Accounting Policies [Line Items]
Cash	$ 34,200,000	$ 29,400,000
India
Accounting Policies [Line Items]
Cash	15,000,000	10,300,000
Canada
Accounting Policies [Line Items]
Cash	$ 3,600,000	$ 7,000,000
Internally Developed Software Assets
Accounting Policies [Line Items]
Estimated useful life	3 years