Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments - Classification of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details)

v3.21.2
Fair Value of Financial Instruments - Classification of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Recurring - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets:    
Total cash equivalents $ 17,386 $ 24,210
Total financial assets 17,386  
Liabilities:    
Warrants 0 0
Contingent consideration 0 0
Liabilities 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money Market Mutual Funds    
Assets:    
Total cash equivalents 17,386 24,210
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial Paper    
Assets:    
Total cash equivalents 0 0
Short-term investments 0  
Significant Other Observable Inputs (Level 2)    
Assets:    
Total cash equivalents 4,879 4,500
Total financial assets 17,026  
Liabilities:    
Warrants 0 0
Contingent consideration 0 0
Liabilities 0 0
Significant Other Observable Inputs (Level 2) | Money Market Mutual Funds    
Assets:    
Total cash equivalents 0 0
Significant Other Observable Inputs (Level 2) | Commercial Paper    
Assets:    
Total cash equivalents 4,879 4,500
Short-term investments 12,147  
Significant Unobservable Inputs (Level 3)    
Assets:    
Total cash equivalents 0 0
Total financial assets 0  
Liabilities:    
Warrants 24 65
Contingent consideration 62,896 65,043
Liabilities 62,920 65,108
Significant Unobservable Inputs (Level 3) | Money Market Mutual Funds    
Assets:    
Total cash equivalents 0 0
Significant Unobservable Inputs (Level 3) | Commercial Paper    
Assets:    
Total cash equivalents 0 $ 0
Short-term investments $ 0