Annual report pursuant to Section 13 and 15(d)

Notes Payable (Narrative) (Details)

v3.22.1
Notes Payable (Narrative) (Details) - Horizon Notes [Member] - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2020
Mar. 29, 2019
Dec. 31, 2020
Debt Instrument [Line Items]      
Debt instrument face value $ 15.0 $ 20.0  
Proceeds from Horizon Notes   15.0  
Loan agreement, unused borrowing capacity   $ 5.0  
Repayment of debt, amount 15.0    
Accrued and unpaid interest 0.1    
Debt instrument, fee 0.8    
Debt instrument, prepayment penalties 0.6    
Commitment fee $ 0.8    
Amortization of debt discount     $ 2.3
Interest expense     $ 2.1