Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments - Reconciliation of Warrant Liability and Contingent Consideration Measured at Fair Value on Recurring Basis Using Unobservable Inputs (Details)

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Fair Value of Financial Instruments - Reconciliation of Warrant Liability and Contingent Consideration Measured at Fair Value on Recurring Basis Using Unobservable Inputs (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Warrant    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Balance at December 31, 2019 $ 65 $ 0
Additions   8,111
Exercise of warrants   (2,922)
Payment of contingent consideration 0 0
Remeasurement 41 16,734
Reclassification to equity upon warrant exchange   (21,858)
Balance 24 65
Current portion as of June 30, 2021 0  
Long-term portion as of June 30, 2021 24  
Contingent Consideration    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Balance at December 31, 2019 65,043 66,358
Additions   0
Exercise of warrants   0
Payment of contingent consideration 7,869 3,560
Remeasurement 5,722 2,245
Reclassification to equity upon warrant exchange   0
Balance 62,896 $ 65,043
Current portion as of June 30, 2021 6,098  
Long-term portion as of June 30, 2021 $ 56,798