Annual report pursuant to Section 13 and 15(d)

Organization and Description of Business (Narrative) (Details)

v3.22.1
Organization and Description of Business (Narrative) (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Mar. 29, 2019
Accumulated deficit   $ (251,844) $ (185,474)  
Horizon Notes [Member]        
Debt instrument face value $ 15,000     $ 20,000
Debt instrument, prepayment penalties 600      
Debt instrument, fee 800      
Accrued and unpaid interest $ 100