Fair Value - Level 3 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Redeemable convertible preferred stock warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 6,684	$ 436
Additions	1,762	6,651
Settlements	(11,030)	(2,493)
Change in fair value, loss included in net loss	2,584	2,090
Ending balance		6,684
FVO notes
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	11,659
Additions		5,500
Settlements	(8,698)
Change in fair value, loss included in net loss	895	6,159
Gain on extinguishment of debt	(3,856)
Ending balance		11,659
Contingent Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	100	400
Change in fair value, loss included in net loss		(300)
Ending balance		100
Contingent consideration - business combination
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	100
Additions	1,749
Change in fair value, loss included in net loss	1,700
Ending balance	3,549	$ 100
Contingent consideration - earnout
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Additions	50,442
Ending balance	$ 50,442