Quarterly report pursuant to Section 13 or 15(d)

Notes Payable - Balance Sheet Information (Details)

v3.21.2
Notes Payable - Balance Sheet Information (Details) - Horizon & Powerscourt Notes - USD ($)
$ in Thousands
Sep. 30, 2021
Jun. 04, 2021
Dec. 31, 2020
Notes Payable      
Debt Instrument [Line Items]      
Notes payable, gross $ 36,050   $ 0
Less: Unamortized debt discount and issuance costs 3,567   0
Carrying value of notes payable, non-current 32,483   0
Final payment fee $ 1,100    
Additional final payment percentage 3.00% 3.00%  
Initial Note      
Debt Instrument [Line Items]      
Notes payable, gross $ 20,600   0
Second Note      
Debt Instrument [Line Items]      
Notes payable, gross 10,300   0
Third Note      
Debt Instrument [Line Items]      
Notes payable, gross $ 5,150   $ 0