Quarterly report pursuant to Section 13 or 15(d)

Convertible Note Payable (Details)

v3.20.2
Convertible Note Payable (Details) - USD ($)
$ in Thousands
6 Months Ended
Jan. 24, 2019
Jun. 30, 2020
Jun. 30, 2019
Short-term Debt [Line Items]      
Outstanding principal and interest, convertible debt   $ 0 $ 6,651
Interstate Battery Systems International, Inc.      
Short-term Debt [Line Items]      
Outstanding principal and interest, convertible debt $ 6,700    
Amortization of debt discount 2,600    
Deferred financing expenses $ 20,000