Stockholders' Equity - Allocation Of Proceeds (Details) - Interstate Battery System International, Inc. and Other Investors $ in Thousands |
12 Months Ended |
---|---|
Dec. 31, 2018
USD ($)
| |
Class of Stock [Line Items] | |
Fair value | $ 26,463 |
Allocated value | 10,000 |
Convertible Note | |
Class of Stock [Line Items] | |
Fair value | 4,879 |
Allocated value | 1,844 |
Warrant | |
Class of Stock [Line Items] | |
Fair value | 13,586 |
Allocated value | 5,134 |
Common Stock | |
Class of Stock [Line Items] | |
Fair value | 7,998 |
Allocated value | $ 3,022 |