v3.20.1

Duke Financing Obligation (Details) |  | 11 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Nov. 28, 2018 USD ($) $ / shares shares | Nov. 28, 2018 USD ($) Customer $ / shares shares | Dec. 31, 2019 USD ($) shares | Dec. 11, 2019 $ / shares | Dec. 31, 2018 USD ($) $ / shares shares
Obligation with Joint and Several Liability Arrangement [Line Items] |  |  |  |  |
Duke financing obligation |  |  | $ 0 |  | $ 1,340,700
Common stock, shares issued (in shares) | shares |  |  | 67,105,000 |  | 58,270,934
Arosa |  |  |  |  |
Obligation with Joint and Several Liability Arrangement [Line Items] |  |  |  |  |
Common stock, shares issued (in shares) | shares | 2,000,000 | 2,000,000 |  |  |
Warrant exercise price (in usd per share) | $ / shares | $ 1.25 | $ 1.25 |  |  | $ 1.25
Sales Agreement |  |  |  |  |
Obligation with Joint and Several Liability Arrangement [Line Items] |  |  |  |  |
Sales of battery cells units | Customer |  | 615,000 |  |  |
Proceeds from sale of inventory | $ 1,340,700 |  |  |  |
Duke financing obligation | $ 1,340,700 | $ 1,340,700 |  |  |
Option, exercise price | $ / shares |  |  |  | $ 2.18 |

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