Debt - Runway Growth Credit Fund (Details) $ in Thousands			1 Months Ended			3 Months Ended	12 Months Ended
	Dec. 23, 2020 USD ($)	Dec. 19, 2019 USD ($)	Sep. 30, 2021 USD ($)	Jul. 31, 2020 USD ($)	May 31, 2020 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Amount borrowed		$ 3,000
Gain (loss) on extinguishment of debt							$ 5,110	$ 5,748	$ (483)
Proceeds from Issuance of Debt		$ 3,000					413,537	66,190	31,300
Long-term Debt						$ 47,983	$ 414,735	47,983
Senior Secured Term Loans
Debt Instrument [Line Items]
Amount borrowed				$ 47,000
Interest expenses				800
Outstanding principle			$ 40,000
Prepayment fees			2,300
Interest expense			500
Gain (loss) on extinguishment of debt			$ (3,100)
Repayment of loan				37,500	$ 2,500
Debt Instrument, Final Payment Fees									$ 500
Long-term Debt				37,600	$ 37,500
Senior Secured Term Loans | Three-month LIBOR
Debt Instrument [Line Items]
Warrants term									3 months
Senior Secured Term Loans | Runway Growth Credit Fund, Inc. [Member]
Debt Instrument [Line Items]
Amount borrowed				$ 40,000
Loan and Security Agreement , Runway Loan
Debt Instrument [Line Items]
Repayment of loan	$ 7,100
Basis spread on interest rate				9.05%
Paid in kind interest rate				2
Calculated interest rate				11.05%
Loan default				5.00%
Debt Instrument, Final Payment Fees				$ 1,600
Interest and prepayment fees	$ 400
Final payment fee				3.50%
Financial covenants, Minimum cash level				$ 3,000
Financial covenants, Minimum revenue				15,400
Financial covenants, projected revenue percentage						80.00%
Warrants grant date fair value				1,200
Proceeds from Issuance of Debt				$ 7,000
Long-term Debt						$ 39,000		$ 39,000
Loan and Security Agreement , Runway Loan | Loans Repaid Prior To First Anniversary [Member]
Debt Instrument [Line Items]
Repayment fees percentage				2.00%
Loan and Security Agreement , Runway Loan | Loans Repaid Prior to Second Anniversary [Member]
Debt Instrument [Line Items]
Repayment fees percentage				1.50%
Loan and Security Agreement , Runway Loan | Loans Repaid Prior to Third Anniversary [Member]
Debt Instrument [Line Items]
Repayment fees percentage				1.00%
Loan and Security Agreement , Runway Loan | Loans Repaid Prior to Fourth Anniversary [Member]
Debt Instrument [Line Items]
Repayment fees percentage				0.50%
Loan and Security Agreement , Runway Loan | Three-month LIBOR
Debt Instrument [Line Items]
Variable interest rate				0.55%